noun, plural (especially collectively) bait·fish, (especially referring to two or more kinds or species) bait·fish·es.
- a small fish that is a source of food for a larger fish: Fishermen knew the presence of baitfish meant plenty of bass nearby.
- Angling. any small fish, as a minnow or shiner, used as bait.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018