figurative and in extended use. A person likened to an owl, esp. in being active at night (cf. night owl, n. 2), or in looking solemn or wise…

One who (or that which) tires the brain by constant thinking; a ‘busy-brain’.

One who thinks himself, or wishes to be thought, wise; a pretender to wisdom; a foolish person with an air or affectation of wisdom.

a wiseacre.

A formal person, a solemn pretender to wisdom. Obsolete.

A person who nods (in various senses).

A sage; a wiseacre. Also (with lower-case initial) in the U.S., in weakened sense: a legislator, congressman.

A pretender to wisdom; a wiseacre.

a person who relies on his or her own knowledge or intellectual ability.

In disparaging or sarcastic use.

One who resembles, or is comparable to, Solomon, esp. in respect of wisdom or justice; a profoundly wise person, a sage; also ironically, a wiseacre.

transferred. Said ironically of a person of superior cleverness. no conjurer n. one who is far from clever.

(with possessive) as a title of (ironical) respect (cf. 1e).

In playful or ironic use.

One who has a wise head; always in ironical sense, One who fancies himself wise, a wiseacre.

(humorous appellation for a wiseacre).