verb.
Simple past tense and past participle of clutter.
adjective.Scattered with a disorderly mixture of objects; littered
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
filled or scattered with a disorderly accumulation of objects or rubbish
Word Usage
"This technique is quite different from the prey detection style usually employed by vesper bats: a technique suited for short-range prey that are detected in cluttered habitats."