One (a.) Being a single unit, or entire being or thing, and no more; not multifold; single; individual.

One (a.) Denoting a person or thing conceived or spoken of indefinitely; a certain. "I am the sister of one Claudio" [Shak.], that is, of a certain man named Claudio.

One (a.) Pointing out a contrast, or denoting a particular thing or person different from some other specified; -- used as a correlative adjective, with or without the.

One (a.) Closely bound together; undivided; united; constituting a whole.

One (a.) Single in kind; the same; a common.

One (a.) Single; inmarried.

One (n.) A single unit; as, one is the base of all numbers.

One (n.) A symbol representing a unit, as 1, or i.

One (n.) A single person or thing.

One (indef. pron.) Any person, indefinitely; a person or body; as, what one would have well done, one should do one's self.

One (v. t.) To cause to become one; to gather into a single whole; to unite; to assimilite.