a connected line of railway carriages or wagons with or without a locomotive
a moving file of people, vehicles, or animals
= retinue
the vehicles, men, and sometimes animals that accompany an army with baggage, supplies, ammunition, or siege artillery
a connected series of ideas, actions, or events
a part of a gown that trails behind the wearer
a series of connected moving mechanical parts, e.g. gears
a line of gunpowder laid to lead fire to a charge