Dictionary 1. (v. t.) To inhabit or trouble in large numbers; as rats infest a city\; to disturb; to annoy; to frequent and molest or harass; as, fleas infest dogs and cats; a sea infested with pirates.2. (v. t.) Mischievous; hurtful; harassing. Thesaurus beset crawl with creep with flood infiltrate inundate invade overrun overspread overswarm penetrate permeate pervade plague ravage swarm swarm over swarm with |