'Blunderbuss' definitions:

Definition of 'blunderbuss'

From: WordNet
noun
A short musket of wide bore with a flared muzzle

Definition of 'Blunderbuss'

From: GCIDE
  • Blunderbuss \Blun"der*buss\, n. [Either fr. blunder + D. bus tube, box, akin to G. b["u]chse box, gun, E. box; or corrupted fr. D. donderbus (literally) thunder box, gun, musket.]
  • 1. A short gun or firearm, with a large bore, capable of holding a number of balls, and intended to do execution without exact aim. [1913 Webster]
  • 2. A stupid, blundering fellow. [1913 Webster]