:being or amounting to a single unit or individual or entire thing, item, or object rather than two or more; a single: one woman;one nation;one piece of cake.
:being a person, thing, or individual instance or member of a number, kind, group, or category indicated: one member of the party.
:existing, acting, or considered as a single unit, entity, or individual.
:of the same or having a single kind, nature, or condition: We belong to one team.We are of one resolve.
:noting some indefinite day or time in the future: You will see him one day.
:a certain: One John Smith was chosen.
:being a particular, unique, or only individual, item, or unit: I'm looking for the one adviser I can trust.
:noting some indefinite day or time in the past: We all had dinner together one evening last week.
:of no consequence as to the character, outcome, etc.; the same: It's all one to me whether they go or not.
:the first and lowest whole number, being a cardinal number; unity.
:a symbol of this number, as 1 or I.
:a single person or thing: If only problems would come one at a time!
:a die face or a domino face having one pip.
:a one-dollar bill: to change a five-dollar bill for five ones.
:One. Philosophy. the ultimate reality, seen as a central source of being by whose emanations all entities, spiritual and corporeal, have their existence, the corporeal ones containing the fewest of the emanations.
pron.代词 pronoun
1
:a person or thing of a number or kind indicated or understood: one of the Elizabethan poets.
: a person unless definitely specified otherwise: every one.
: a person or a personified being or agency: the evil one;the one I love.
:any person indefinitely; anyone: as good as one would desire.
:Chiefly British.: Mother had been ailing for many months, and one should have realized it.
:a person of the speaker's kind; such as the speaker himself or herself: to press one's own claims.
:something or someone of the kind just mentioned: The portraits are fine ones.Your teachers this semester seem to be good ones.
:something available or referred to, especially in the immediate area: Here, take one—they're delicious.The bar is open, so have one on me!