Look up startle in Wiktionary, the free dictionary.
The startle response is an unconscious defensive response to sudden or threatening stimuli.
Startle may also refer to:
- Startle display or deimatic behaviour, any pattern of bluffing behaviour in an animal that lacks strong defences
- Startle syndrome or hyperekplexia, a rare neurologic disorder
- Fear-potentiated startle, a reflexive physiological reaction to a presented stimulus