(idiomatic) Sleeping still and silently.

(idiomatic) Sleeping, in a deep sleep.

(archaic, literary) Slanting.

(archaic, literary) At a slant.

(archaic, literary) Diagonally over or across.

(idiomatic) Neglectful of an important task, responsibility, or opportunity.

Showing signs of being asleep or very sleepy, as not demonstrating full energy or attention.

Archaic spelling of asleep.

Third-person singular simple present indicative form of fall asleep

past participle of fall asleep