1. \ ˈwən How to pronounce one (audio) \

            Definition of one

             (Entry 1 of 4)

            1 : being a single unit or thing one day at a time She is one year old.
            2a : being one in particular early one morning The Grand Canyon is one place I'd like to visit.
            b : being preeminently what is indicated one fine person She is one tough teacher.
            3a : being the same in kind or quality both of one species "Puma" and "cougar" are different names for one animal.
            b(1) : constituting a unified entity of two or more components The combined elements form one substance.
            (2) : being in agreement or union am one with you on this
            4a : some sense 1 will see you again one day
            b : being a certain individual specified by name one John Doe made a speech
            5 : only sense 2a the one person she wanted to marry

            one

            noun

            Definition of one (Entry 2 of 4)

            1 : the first whole number above zero — see Table of Numbers
            2 : the number denoting unity
            3a : the first in a set or series often used with an attributive nounday one
            b : an article of clothing of a size designated one wears a one
            4 : a single person or thing has the one but needs the other
            5 : a one-dollar bill
            at one
            : at harmony : in a state of agreement
            for one
            : as one example I for one disagree

            Definition of one (Entry 3 of 4)

            1 : a certain indefinitely indicated person or thing saw one of his friends
            2a : an individual of a vaguely indicated group : anyone at all one never knows
            b used as a third person substitute for a first person pronounI'd like to read more but one doesn't have the time.
            3 : a single instance of a specified action felt like belting him one— John Casey

            Definition of -one (Entry 4 of 4)

            : ketone or related or analogous compound or class of compounds lactone quinone

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            Synonyms for one

            Synonyms: Adjective

            Synonyms: Noun

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            Using One as a Pronoun: Usage Guide

            Pronoun

            Sense 2a is usually a sign of a formal style. A formal style excludes the participation of the reader or hearer; thus one is used where a less formal style might address the reader directly. for the consequences of such choices, one has only oneself to thank — Walker Gibson This generic one has never been common in informal use in either British or American English, and people who start sentences with one often shift to another pronoun more natural to casual discourse. when one is learning the river, he is not allowed to do or think about anything else — Mark Twain Use of one to replace a first-person pronoun—sense 2b—has occasionally been criticized. It is more common in British English than in American. I'm watching this pretty carefully and I hope that the issue will come up in the Lords and one may be able to speak about it — Donald Coggan

            Examples of one in a Sentence

            Adjective There is one minute left in the game. I have a few one-dollar bills in my purse. She is one year old. Noun one, two, three, four, … I don't have any ones. Can you break a five? I'll be there at one. Pronoun “I'll have an iced tea, please.” “I'll have one, too.” Their dog died, but they plan to get another one. “You should wear the blue one.” “The one with the stripes?” “No, the other one.” I'd like to see the ring next to that one. Which one did you like better? He is the one who called the police. That's one possible answer—but not the only one. I would like to read more, but one doesn't have the time.
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            Recent Examples on the Web: Adjective Drinkwater didn't make one appearance in a Chelsea shirt last season, whilst Bakayoko spent the season in Italy on loan at AC Milan. SI.com, "Chelsea Set to Entertain Offers for Out of Favour Midfield Pair Ahead of Transfer Deadline," 3 Aug. 2019 Decisions made by engineers today, in other words, will determine not how one car drives but how all cars drive. Johannes Himmelreich, BostonGlobe.com, "The everyday moral challenges of self-driving cars," 30 Mar. 2018 Decisions made by engineers today, in other words, will determine not how one car drives but how all cars drive. Johannes Himmelreich, Smithsonian, "The Ethical Challenges Self-Driving Cars Will Face Every Day," 27 Mar. 2018 Drinkwater didn't make one appearance in a Chelsea shirt last season, whilst Bakayoko spent the season in Italy on loan at AC Milan. SI.com, "Chelsea Set to Entertain Offers for Out of Favour Midfield Pair Ahead of Transfer Deadline," 3 Aug. 2019 Decisions made by engineers today, in other words, will determine not how one car drives but how all cars drive. Johannes Himmelreich, BostonGlobe.com, "The everyday moral challenges of self-driving cars," 30 Mar. 2018 Decisions made by engineers today, in other words, will determine not how one car drives but how all cars drive. Johannes Himmelreich, BostonGlobe.com, "The everyday moral challenges of self-driving cars," 30 Mar. 2018 Decisions made by engineers today, in other words, will determine not how one car drives but how all cars drive. Johannes Himmelreich, BostonGlobe.com, "The everyday moral challenges of self-driving cars," 30 Mar. 2018 Decisions made by engineers today, in other words, will determine not how one car drives but how all cars drive. Johannes Himmelreich, BostonGlobe.com, "The everyday moral challenges of self-driving cars," 30 Mar. 2018 Recent Examples on the Web: Noun This weekend’s simulation is something that happens every year, an Operational Readiness Exercise, this one involving a hazmat drill. Barrett Swanson, Harper's Magazine, "This Is Not a Test," 23 June 2020 Last year's sale also blacked out Labor Day weekend travel, but this one does not. Dawn Gilbertson, USA TODAY, "Ready to fly again? Southwest launches annual fall fare sale, with one-way tickets starting at $39," 23 June 2020 There seems to be consensus on this one among our scientists. Cnn Staff, CNN, "The US Wasn't Prepared for Covid-19: Dr. Sanjay Gupta's coronavirus podcast for June 22," 22 June 2020 As always, there’s plenty of room for surprises, but in the meantime, here’s what to expect: iOS 14 There’s bound to be some twists in the details, but broadly speaking this one is pretty much a given. Boone Ashworth, Wired, "How to Watch Apple's WWDC 2020 Keynote (and What to Expect)," 21 June 2020 Donald Trump doesn’t believe in gentlemen’s agreements, and his administration this week broke this one. The Economist, "Bello A gringo takeover bid for the Inter-American Development Bank," 20 June 2020 This one can be found on Lemmon Avenue where the Katy Trail passes overhead. Shannon Sutlief, Dallas News, "Take our photo quiz to test your knowledge of North Texas sights," 18 June 2020 Another shift – this one toward Jaap Stam's interpretation of the uptempo playing style –continued Wednesday as Stam and new assistant coach Said Bakkati joined the existing FC Cincinnati coaching staff for their second training session together. Pat Brennan, Cincinnati.com, "How FC Cincinnati is preparing for MLS is Back Tournament under Jaap Stam," 17 June 2020 This will be Woodward's second book about President Trump, who claims he was interviewed for this one. Mike Brest, Washington Examiner, "Bob Woodward's second Trump book to be released ahead of 2020 election," 17 June 2020

            These example sentences are selected automatically from various online news sources to reflect current usage of the word 'one.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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            First Known Use of one

            Adjective

            before the 12th century, in the meaning defined at sense 1

            Noun

            before the 12th century, in the meaning defined at sense 1

            Pronoun

            13th century, in the meaning defined at sense 1

            History and Etymology for one

            Adjective, Noun, and Pronoun

            Middle English on, an, from Old English ān; akin to Old High German ein one, Latin unus (Old Latin oinos), Sanskrit eka

            Noun suffix

            International Scientific Vocabulary, alteration of -ene

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            Learn More about one

            Time Traveler for one

            Time Traveler

            The first known use of one was before the 12th century

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            Statistics for one

            Cite this Entry

            “One.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/one. Accessed 7 Jul. 2020.

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            More Definitions for one

            How to pronounce -one (audio)

            English Language Learners Definition of one

             (Entry 1 of 3)

            : having the value of 1
            used to refer to a single person or thing
            used before a noun to indicate that someone or something is part of a group of similar people or things

            one

            noun

            English Language Learners Definition of one (Entry 2 of 3)

            : the number 1
            US : a one-dollar bill
            : one o'clock

            English Language Learners Definition of one (Entry 3 of 3)

            : that person or thing
            : someone or something that is a part of a particular group
            somewhat formal : people in general : any person
            \ ˈwən How to pronounce one (audio) \

            Kids Definition of one

             (Entry 1 of 3)

            1 : being a single unit or thing There's one catch.
            2 : being a certain unit or thing He arrived early one morning.
            3 : being the same in kind or quality All the members of one class will sit together.
            4 : not specified We'll meet again one day.

            one

            noun

            Kids Definition of one (Entry 2 of 3)

            1 : the number denoting a single unit : 1
            2 : the first in a set or series
            3 : a single person or thing

            Kids Definition of one (Entry 3 of 3)

            1 : a single member or individual I met one of your friends.
            2 : any person One never knows what will happen.

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            More from Merriam-Webster on one

            Thesaurus: All synonyms and antonyms for one

            Rhyming Dictionary: Words that rhyme with one

            Spanish Central: Translation of one

            Nglish: Translation of one for Spanish Speakers

            Britannica English: Translation of one for Arabic Speakers

            Comments on one

            What made you want to look up one? Please tell us where you read or heard it (including the quote, if possible).

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            Merriam-Webster unabridged

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