n. The presence of a large number of pest organisms in an area or field, on the surface of a host or anything that might contact a host, or in the soil.
the GNU version of the Collaborative International Dictionary of English
n. The act of infesting or state of being infested; molestation; vexation; annoyance.
The Century Dictionary and Cyclopedia
n. The act of infesting or harassing; harassment; molestation.
n. A harassing inroad; a malignant or mischievous invasion.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a swarm of insects that attack plants
n. the state of being invaded or overrun by parasites
Word Usage
"This type of infestation is the result of letting people have these things as pets."