bolt definition

1. a sliding bar in a breech-loading firearm that ejects an empty cartridge and replaces it and closes the breech
2. the part of a lock that is engaged or withdrawn with a key
3. a roll of cloth or wallpaper of a definite length
4. a screw that screws into a nut to form a fastener
5. a sudden abandonment (as from a political party)
6. move or jump suddenly
• examples: She bolted from her seat
7. secure or lock with a bolt
• examples: bolt the door
8. swallow hastily
9. make or roll into bolts
• examples: bolt fabric