aisle

Etymology

From Middle English ele, from Middle French aisle (“wing”) (Modern French aile), from Latin āla.

noun

1. A wing of a building, notably in a church separated from the nave proper by piers.
   Hester Earle and Violet Wayne were moving about the aisle with bundles of wheat-ears and streamers of ivy, for the harvest thanksgiving was shortly to be celebrated, while the vicar stood waiting for their directions on the chancel steps with a great handful of crimson gladioli. 1907, Harold Bindloss, chapter 20, in The Dust of Conflict
   In one of the aisles there was an elaborately carved confessional box and I recognised the village priest in his heavy mountain boots and black cassock as he entered it and drew the dark velvet curtains behind him. 1956, Delano Ames, chapter 13, in Crime out of Mind
2. A clear path through rows of seating.
3. A clear corridor in a supermarket with shelves on both sides containing goods for sale.
4. Any path through an otherwise obstructed space.
   It is realised that the old Pullman standard sleeper, with its convertible "sections", each containing upper and lower berths, and with no greater privacy at night than the curtains drawn along both sides of a middle aisle, has had its day. 1944 November and December, “"Duplex Roomette" Sleeping Cars”, in Railway Magazine, page 324
5. (transport) Seat in public transport, such as a plane, train or bus, that's beside the aisle.
   Do you want to seat window or aisle?
6. (US, politics) An idiomatic divide between the Republican Party and the Democratic Party, who are said to be on two sides of the aisle.
7. The path of a wedding procession in a church or other venue; (by extension, metonymically) marriage.
   You ask her if she loves you, she answers, "I do" / Your heart starts glowing inside / And then you will know she is just for you / While each step, draws you closer to the aisle 1957, The Five Satins (lyrics and music), “To the Aisle”