An aisle is a long and narrow path or area in a building that people can walk through.
When you go shopping at the mall or a big store, you probably know what an aisle is. It's that wide pathway between rows of shelves with products on them. You walk down an aisle to pick up something from the top shelf or to check out a new product. Aisles are also found in churches and other places of worship, where they lead people to their seats. Sometimes, aisles can be part of a big event, like a concert or a wedding, where guests walk down them to take their seats. In all these cases, an aisle is just a convenient path for people to follow.
How common is "aisle"?
Word aisle is considered uncommon in modern English. It appears most frequently in fiction texts and less often in other writings.
Definitions
noun
A wing of a building, notably in a church separated from the nave proper by piers.
A clear path/passage through rows of seating.
A clear corridor in a supermarket with shelves on both sides containing goods for sale.
Any path through an otherwise obstructed space.
(transport) Seat in public transport, such as a plane, train or bus, that's beside the aisle.
Example: Do you want to seat window or aisle?
(US, politics) An idiomatic divide between the Republican Party and the Democratic Party, who are said to be on two sides of the aisle.
The path of a wedding procession in a church or other venue; (by extension, metonymic) marriage.