1. (n.) Drowsy; inclined to, or overcome by, sleep.
2. (n.) Tending to induce sleep; soporiferous; somniferous; as, a sleepy drink or potion.
3. (n.) Dull; lazy; heavy; sluggish.
4. (n.) Characterized by an absence of watchfulness; as, sleepy security.
Thesaurus Entries
anesthetized, apathetic, asleep, beat, benumbed, blase, bored, boring, cataleptic, comatose, dazed, dead, debilitated, doped, dopey, dormant, dozy, dreamy, droopy, drowsy, drugged, drugged with sleep, dull, enervated, exanimate, exhausted, fatigued, half asleep, heavy, heavy with sleep, heavy-eyed, hebetudinous, hypnotic, idle, in a stupor, inactive, inanimate, inert, jaded, knocked out, lackadaisical, languid, languorous, leaden, lethargic, lifeless, listless, lumpish, moribund, napping, narcoleptic, narcose, narcotic, narcotized, narcous, nodding, numb, opiate, oscitant, out, out of it, passive, phlegmatic, pooped, quiet, sated, sedated, sleep-drowned, sleep-drunk, sleep-filled, sleep-swollen, sleepful, sleeping, slow, sluggish, slumbering, slumberous, slumbery, snoozy, somnifacient, somniferous, somnolent, soporific, stagnant, stagnating, stretchy, stultified, stuporose, stuporous, supine, tired, torpid, vegetable, vegetative, wan, weary, world-weary, yawning, yawny
