A phrase that consists of a verb with a preposition or adverb or both, the meaning of which is different from the meaning of its separate parts.
power something up
to start something, such as an engine.
You should power the engine up and let it run awhile before you drive away.
Phrasal verbs are two or more words that come together to give us a new verb with a different meaning from the original words.
A compilation of 50 phrasal verbs.