The American Heritage® Dictionary of the English Language, 4th Edition
n. Any of various brightly colored fishes of the family Balistidae of warm coastal waters, having a roundish body and an erectile spine on the anterior dorsal fin that locks upright when the fish is threatened.
n. any of several brightly coloured fish, of the family Balistidae, that inhabit tropical reefs, and have an erectile spine on its dorsal fin
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin
Word Usage
"However it does raise a schwit1 sends along an Ars Technica report covering the release of documents obtained under the FOIA suggesting that the Justice Department may have been evading privacy laws in their use of "triggerfish" technology."