phrasal verb

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An English verb complex consisting of a verb and one or more following particles and acting as a complete syntactic and semantic unit, as look up in She looked up the word in the dictionary or She looked the word up in the dictionary.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun grammar A phrase, consisting of a verb and either or both of a preposition or adverb, that has idiomatic meaning.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an English verb followed by one or more particles where the combination behaves as a syntactic and semantic unit