'Wiseacre' definitions:

Definition of 'wiseacre'

From: WordNet
noun
An upstart who makes conceited, sardonic, insolent comments [syn: wise guy, smart aleck, wiseacre, wisenheimer, weisenheimer]

Definition of 'Wiseacre'

From: GCIDE
  • Wiseacre \Wise"a*cre\, n. [OD. wijssegger or G. weissager a foreteller, prophet, from weissagen to foretell, to prophesy, OHG. w[imac]ssag?n, corrupted (as if compounded of the words for wise and say) fr. w[imac]zzag?n, fr. w[imac]zzag? a prophet, akin to AS. w[imac]tiga, w[imac]tga, from the root of E. wit. See Wit, v.] [1913 Webster]
  • 1. A learned or wise man. [Obs.] [1913 Webster]
  • Pythagoras learned much . . . becoming a mighty wiseacre. --Leland. [1913 Webster]
  • 2. One who makes undue pretensions to wisdom; a would-be-wise person; hence, in contempt, a simpleton; a dunce. [1913 Webster]