inchworm UK /ˈɪnt͡ʃ.wɜːm/US /ˈɪnt͡ʃ.wɚm/verb 2noun 1forms 3 verb2 •(informal) To move in a looping fashion, like an inchworm. •(informal) To crawl or creep slowly. noun1 •The larva of a moth of the family Geometridae. formsinchwormed · inchworming · inchworms