one

²one

noun

Definition of ONE

1

— see number table

2

: the number denoting unity

3

a : 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>

Examples of ONE

1. one, two, three, four, …
2. I don't have any ones. Can you break a five?
3. I'll be there at one.

First Known Use of ONE

before 12th century

Related to ONE

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

Related Words: greenback; dead presidents [slang]

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Other Number-Related Terms

jubilee, myriad, quarantine, score, twain