unslept adjective3 •Not having been slept.My eyes burn from sleep unslept and from tears unshed. I long for oblivion. I am impossibly tired. — 2011 •Not having been slept (in, on, with, etc.); usually with a preposition.The high-tension wires were lightning held forever, blazing, a threat above the unslept houses. — 1957 •Not having slept; sleep-deprived.Dawn of a new day, me unslept from the old, a refugee from the night. — 2010