pest /pest/ n. | phr. n. 1. 有害生物；害虫 an insect pest 害虫 pest control 虫害防治 Greenfly and slugs are two common garden pests. 蚜虫和蛞蝓是两种常见的园圃害虫。 2. 〈口〉有害的东西；害人精；讨厌的人 pests of society 社会蟊贼 That child is too much of a pest! 那小孩真叫人讨厌! 3. 〈古〉瘟疫，疫病；鼠疫 [< L pestis plague < ?]