›[I or T, usually+ adv/prep]to move into a position quickly, producing a short noise as if breaking: Tendons store elastic energy by stretching and then snapping back into shape like rubber bands.Simply snap the pieces into place.Moving quicklySounds made by objects, movement or impact›[I+ adv/prep]to quickly return to a previous place or condition: After substantial losses last year, the company has snapped back to profitability (= started making profits again).Returning to a placeRestoring and revivingsnap shutC2If something snaps shut or is snapped shut, it closes quickly with a sudden sharp sound: She snapped her book shut and got up to leave.Her mouth snapped shut when she realized he'd heard everything she'd said about him.Closing and blocking