On″ly (?), a. [OE. only, anly, onlich, AS. ānlic, i.e., onelike. See One, and Like, a.] 1. One alone; single; as, the only man present; his only occupation.
2. Alone in its class; by itself; not associated with others of the same class or kind; as, an only child.
3. Hence, figuratively: Alone, by reason of superiority; preëminent; chief. “Motley's the only wear.” Shak.