D defs.my
Entry 4 senses Webster, 1913

Sleepy

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