WordWeb Online

1. Invade in great numbers
   "the roaches infested our kitchen";
   - overrun
    
2. Occupy in large numbers or live on a host
   "the Kudzu plant infests much of the South and is spreading to the North";
   - invade, overrun
    
3. Live on or in a host, as of parasites

Derived forms: infests, infesting, infested

Type of: inhabit, invade, occupy

Encyclopedia: Infest