Entry 1 sense Webster, 1913 Crocodilia /(-d?l"?-?)/ · Croc·o·dil·i·a · IPA 01 n. pl. An order of reptiles including the crocodiles, gavials, alligators, and many extinct kinds. 1. An order of reptiles including the crocodiles, gavials, alligators, and many extinct kinds.(Zool.)