Dictionary Definition:
á-svapat mfn. not sleeping Suparṇ
á-svapat m. sleeplessness ŚBr. iii ṢaḍvBr. (am, n.) VarBṛS
• (a-svapná), mfn. (= ?) not sleeping, watchful AV
• not dreaming NṛisUp
• m. 'sleepless', a god L