Pronunciation: (īl),[key] —n. 1. a walkway between or along sections of seats in a theater, classroom, or the like.
2. Archit. a. a longitudinal division of an interior area, as in a church, separated from the main area by an arcade or the like.
b. any of the longitudinal divisions of a church or the like.
3. in the aisles, (of an audience) convulsed with laughter.