1. A complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise); involves flexion of most skeletal muscles and a variety of visceral reactions
   - startle response

Derived forms: startle reactions

Type of: jump, start, startle

Encyclopedia: Startle reaction

• shunter
• shush
• shut
• shut away
• shut in
• shut off
• shut one's mouth
• shut up
• shutdown
• Shute
• shuteye
• shutout
• shutter
• shutterbug
• shuttered
• shutting
• shutting post
• shuttle
• shuttle bus
• shuttle diplomacy
• shuttle helicopter
• shuttlecock
• shuttlecock fern
• shwa
• shy