Main Entry:

²one

Function:

noun

Date:

before 12th century

1 — see number table2: the number denoting unity3 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>