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.
match up [for things or people]
to match, be equal, or complementary.
These match up. See how they are the same length?
Phrasal verbs consists of a basic verb + another word or words. The two or three words that make up a phrasal verb form a short 'phrase' - which is why we call them 'phrasal verbs'.
A compilation of 50 phrasal verbs.