Overview of noun insomniac

The noun insomniac has 1 sense

• insomniac, sleepless person -- (someone who cannot sleep)

Overview of adj insomniac

The adj insomniac has 1 sense

• insomniac, sleepless, watchful -- (experiencing or accompanied by sleeplessness; "insomniac old people"; "insomniac nights"; "lay sleepless all night"; "twenty watchful, weary, tedious nights"- Shakespeare)