Definition of one:

part of speech: noun

Used in an indefinite sense, any man; any person, as one's own choice, one may speak; one's self or oneself, I and not another.

part of speech: noun

A single person; a single thing.

part of speech: adjective

An individual; a single number; opposed to another or other; some or any; different; individual.

Usage examples:

• It will have to be an apartment, my dear, the experienced Miss Tripp declared; and I believe I know the very one in a really good neighbourhood. in "".

• I and the Father are one Marcus Dods in "The Expositor's Bible: The Gospel of St. John, Vol. I".

• It was Bill Gormley, one of the Wampole Company. Ralph Bonehill in "Leo the Circus Boy".

• One was that he was a " sent back." Alexander Irvine in "My Lady of the Chimney Corner".