Source : Webster's Revised Unabridged Dictionary (1913)

Oscitant \Os"ci*tant\, a. [L. oscitans, -antis, p. pr. of
   oscitare: cf. F. oscitant.]
   1. Yawning; gaping.

   2. Sleepy; drowsy; dull; sluggish; careless.

            He must not be oscitant, but intent on his charge.
                                                  --Barrow.

Source : WordNet®

oscitant
     adj : showing lack of attention or boredom; "the yawning
           congregation" [syn: {drowsy}, {yawning(a)}]