bolt
noun
a discharge of lightning accompanied by thunder
a sliding bar in a breech-loading firearm that ejects an empty cartridge and replaces it and closes the breech
the part of a lock that is engaged or withdrawn with a key
Synonymsdeadboltthe act of moving with great haste
“he made a dash for the door”
Synonymsdasha roll of cloth or wallpaper of a definite length
a screw that screws into a nut to form a fastener
a sudden abandonment (as from a political party)
verb
move or jump suddenly
“She bolted from her seat”
secure or lock with a bolt
“bolt the door”
Oppositesunboltswallow hastily
run away; usually includes taking something or somebody along
“The thief made off with our silver”
“the accountant absconded with the cash from the safe”
leave suddenly and as if in a hurry
“The listeners bolted when he discussed his strange ideas”
“When she started to tell silly stories, I ran out”
eat hastily without proper chewing
“Don't bolt your food!”
Synonymsgobblemake or roll into bolts
“bolt fabric”
adverb
in a rigid manner
“the body was rigidly erect”
“he sat bolt upright”
directly
“he ran bang into the pole”
“ran slap into her”
Source: WordNet 3.1, Princeton University