The definition of an aisle is a passageway between different sections.(noun)
An example of an aisle is the location where a priest and the altar servers walk down at the beginning of a Catholic Mass.
See aisle in Webster's New World College Dictionary
Origin: ME ile < OFr aile, wing, section of a building (see aileron); E -s- through confusion with isle
See aisle in American Heritage Dictionary 4
Origin: Alteration (influenced by isle and French aile, wing)
Origin: of Middle English ele
Origin: , from Old French, wing of a building
Origin: , from Latin āla.
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