One

Webster's Dictionary of the English Language

·adj Single; inmarried.

II. One ·noun A single person or thing.

III. One ·adj Single in kind; the same; a common.

IV. One ·noun A symbol representing a unit, as 1, or i.

V. One ·noun A single unit; as, one is the base of all numbers.

VI. One ·adj Closely bound together; undivided; united; constituting a whole.

VII. One ·adj Being a single unit, or entire being or thing, and no more; not multifold; single; individual.

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

IX. One ·vt To cause to become one; to gather into a single whole; to Unite; to Assimilite.

X. One ·adj 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.

XI. One ·adj 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.