A bolt may be one of the following things:

• A type of threaded fastener. See screw.
• A rotating mechanism used in some firearms. See bolt action.
• A lightning bolt.
• The ammunition used in a crossbow. See quarrel.
• An item of door furniture: a bar that is used to hold a door shut, also known as a deadbolt. See lock.
• A large roll of cloth of a definite length, especially as it comes from the loom.
• An anchor point used in rock climbing. See bolt (climbing).
• To go to flower, usually in the case of a vegetable plant like broccoli, which may cause the flavour to change
• To run suddenly, as in bolting for the exit
• A nickname of the San Diego Chargers (Bolts).