1. common, regular, ordinary. usualusu*al , a. [l. usualis, from usus use: cf. f. usuel. see: use, n.] such as is in common use; such as occurs in ordinary practice, or in the ordinary course of events; customary; ordinary; habitual; common. consultation with oracles was a thing very usual and frequent in their times. we can make friends of these usual enemies. -- usu*al*ly , adv. -- usu*al*ness , n.usual adj