(tr) to guide or teach (to do something), as by subjecting to various exercises or experiences: to train a man to fight
2.
(tr) to control or guide towards a specific goal: to train a plant up a wall
3.
(intr) to do exercises and prepare for a specific purpose: the athlete trained for the Olympics
4.
(tr) to improve or curb by subjecting to discipline: to train the mind
5.
(tr) to focus or bring to bear (on something): to train a telescope on the moon
—n
6.
a. a line of coaches or wagons coupled together and drawn by a railway locomotive
b. (as modifier): a train ferry
7.
a sequence or series, as of events, thoughts, etc: a train of disasters
8.
a procession of people, vehicles, etc, travelling together, such as one carrying supplies of ammunition or equipment in support of a military operation
9.
a series of interacting parts through which motion is transmitted: a train of gears
10.
a fuse or line of gunpowder to an explosive charge, etc
11.
something drawn along, such as the long back section of a dress that trails along the floor behind the wearer
12.
a retinue or suite
13.
proper order or course
[C14: from Old French trahiner, from Vulgar Latin tragīnāre (unattested) to draw; related to Latin trahere to drag]