Definition of one

• a. - Being a single unit, or entire being or thing, and no more; not multifold; single; individual.
• 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.
• 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.
• a. - Closely bound together; undivided; united; constituting a whole.
• a. - Single in kind; the same; a common.
• a. - Single; inmarried.
• n. - A single unit; as, one is the base of all numbers.
• n. - A symbol representing a unit, as 1, or i.
• n. - A single person or thing.
• indef. pron. - Any person, indefinitely; a person or body; as, what one would have well done, one should do one's self.
• v. t. - To cause to become one; to gather into a single whole; to unite; to assimilite.