one

adjective

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\ ˈwən

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 noun day 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

one

pronoun

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 pronoun I'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

-one

noun suffix

Definition of -one (Entry 4 of 4)

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

Synonyms Using One as a Pronoun: Usage Guide More Example Sentences Learn More About one

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Synonyms for one

Synonyms: Adjective

Synonyms: Noun

bone
[slang],
buck,
clam,
dollar,
smacker
[slang]

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.

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, 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, 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, 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, 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, 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, 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, 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, 30 Mar. 2018 Recent Examples on the Web: Noun The parents' Vegas trip came on the heels of a vacation to Disney World with their little one to celebrate his first birthday. — Mark Gray, PEOPLE.com, 18 Sep. 2021 But those on the East Coast don’t have to worry about a landfalling storm with this one. — Leigh Morgan, al, 17 Sep. 2021 While past Fuel teams had recognizable stars, fan-favorites and a couple prideful moments in matches, those teams didn’t connect like this one. — Sean Collins, Dallas News, 16 Sep. 2021 Tuesday’s formula was more familiar with the one that led them on a 13-game winning streak in August. — Kristie Ackert, courant.com, 15 Sep. 2021 Yet with America’s coastal defenses buckling, and 100 million Americans living in coastal counties, projects like this one are emerging as an important piece of larger efforts to adapt to rising seas and greater flood risks. — Patrik Jonsson, The Christian Science Monitor, 15 Sep. 2021 In addition to that, work continues on the game’s first major DLC, coming next year, with a second one to follow, and possibly some sort of multiplayer component after that. — Paul Tassi, Forbes, 14 Sep. 2021 Gail replaced two small windows with a large circular one in the wall of the room off the kitchen and installed an elephant on the terrace. — Wendy Goodman, Curbed, 13 Sep. 2021 But each family with a loved one serving in the war made a sacrifice. — Becky Perlow, ABC News, 11 Sep. 2021

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.