Question

read the meanings of the word bolt, then read the sentence.
definition 1. n., a screw for fastening
definition 2. n., a strike of lightning
definition 3. n., a bar that slides to lock something
definition 4. n., a roll of fabric or wallpaper
please make sure you latch the bolt on the window when you close it tonight.
what is the meaning of bolt as it is used in this sentence?
definition 1
definition 2
definition 3
definition 4

Explanation:

The sentence mentions latching the bolt on the window. A window bolt is a bar that slides to lock something (the window in this case). Definition 1 (a screw for fastening) is for mechanical fastening, not for windows. Definition 2 (a strike of lightning) is weather - related. Definition 4 (a roll of fabric or wallpaper) is about materials.

Answer:

Definition 3