Adjective sleepless has 2 senses
  1. insomniac, sleepless, watchful - experiencing or accompanied by sleeplessness; "insomniac old people"; "insomniac nights"; "lay sleepless all night"; "twenty watchful, weary, tedious nights"- Shakespeare
    Antonym: asleep (indirect, via awake)
  2. lidless, sleepless - without having the eyes closed or covered by the eyelids; "to an eye like mine, a lidless watcher of the public weal"- Alfred Tennyson
    Antonym: unalert (indirect, via alert)
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