Meaning
To turn on a computer and load its operating system.
Example Sentence
"It takes my old laptop almost five minutes just to boot up."
Synonyms
start up
turn on
power up
Usage Note
This phrasal verb is separable. When using a noun object, it can go between the verb and particle or after the particle. When using a pronoun object, it must go between the verb and particle (e.g., "turn it off" not "turn off it").