Noah Webster's Dictionary 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.

Multi-Version Concordance Sleepy (1 Occurrence) Luke 9:32 but Peter and those with him were heavy with sleep, and having waked, they saw his glory, and the two men standing with him. (See NIV)