A line of people or vehicles waiting their turn

• Newcomers join at the back

A waiting list or ordered sequence to be processed

• First-come, first-served arrangement

Computing: a data structure with FIFO behavior

• Items enqueued at the tail and dequeued at the head

To line up; to form a queue

• To place oneself at the end of a line

To add something to a queue

• To enqueue

Historical: a man's braid or ponytail at the back

Archaic: an animal's tail