Sleepy \Sleep"y\, a. [Compar. Sleepier; superl. Sleepiest.]

[AS. sl?pig. See Sleep, n.]

1. Drowsy; inclined to, or overcome by, sleep. --Shak.

She waked her sleepy crew. --Dryden.

2. Tending to induce sleep; soporiferous; somniferous; as, a sleepy drink or potion. --Chaucer.

3. Dull; lazy; heavy; sluggish. --Shak.

'Tis not sleepy business; But must be looked to speedily and strongly. --Shak.

4. Characterized by an absence of watchfulness; as, sleepy security.

Sleepy duck (Zo["o]l.), the ruddy duck.

Source: Webster's Revised Unabridged Dictionary (1913)