'bullhorn' definitions:

Definition of 'bullhorn'

(from WordNet)
noun
A portable loudspeaker with built-in microphone and amplifier [syn: bullhorn, loud hailer, loud-hailer]

Definition of 'bullhorn'

From: GCIDE
  • bullhorn \bullhorn\ n. a portable loudspeaker with built-in microphone and amplifier.
  • Syn: loud-hailer. [WordNet 1.5]