01 a. Drowsy; inclined to, or overcome by, sleep.
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1.
Drowsy; inclined to, or overcome by, sleep.“She waked her sleepy crew.” — Dryden.
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2.
Tending to induce sleep; soporiferous; somniferous; as, a sleepy drink or potion.
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3.
Dull; lazy; heavy; sluggish.“'Tis not sleepy business; But must be looked to speedily and strongly.” — Shak.
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4.
Characterized by an absence of watchfulness; as, sleepy security.
Phrases & compounds
Sleepy duck —
the ruddy duck.