Definition from Wiktionary, the free dictionary
- Tending to repel, causing avoidance (of a situation, a behaviour, an item, etc),
- (grammar, uncountable) A grammatical case indicating that something is avoided or feared; the evitative case.
- (psychology, countable) An unpleasant stimulus intended to induce a change in behaviour.
- Skinner, B. F. (1969) Contingencies of Reinforcement. New York: Appleton-Century-Crofts