The answer is:
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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.