Os'ci·tant adjective [ Latin oscitans , -antis , present participle of oscitare : confer French oscitant .] 1. Yawning; gaping. 2. Sleepy; drowsy; dull; sluggish; careless. « He must not be oscitant , but intent on his charge.» Ba... Found on http://www.encyclo.co.uk/webster/O/36