Definitions from Wiktionary (one)

▸ noun:  The digit or figure 1.
▸ noun:  (by ellipsis) Used to briefly refer to a noun phrase understood by context
▸ noun:  (US) A one-dollar bill.
▸ noun:  One o'clock, either a.m. or p.m.
▸ noun:  (cricket) One run scored by hitting the ball and running between the wickets; a single.
▸ noun:  A joke or amusing anecdote.
▸ noun:  (followed by for) A person (having some specified characteristic or attribute).
▸ noun:  (colloquial) A particularly special or compatible person or thing.
▸ noun:  (dated, euphemistic or derogatory) A gay person.
▸ noun:  (mathematics) The identity element with respect to multiplication in a ring.
▸ adjective:  Of a period of time, being particular.
▸ adjective:  Being a single, unspecified thing; a; any.
▸ adjective:  Sole, only.
▸ adjective:  Whole, entire.
▸ adjective:  In agreement.
▸ adjective:  The same.
▸ verb:  (transitive) To cause to become one; to gather into a single whole; to unite.
▸ noun:  (Internet slang, leetspeak, sarcastic) Deliberate misspelling of !. Used to amplify an exclamation, parodying unskilled typists who forget to press the shift key while typing exclamation points, thus typing "1".
▸ Also see one

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