noun
plural trains
a group of vehicles that travel on a track and are connected to each other and usually to an engine :a connected group of railroad cars [count]
[count] old-fashioned :a group of people, vehicles, or animals that are moving in a line
[count] :an orderly series of events, actions, or ideas
[count] technical :a series of moving machine parts (such as gears) for controlling motion
[count] :a part of a long dress that trails behind the woman who is wearing it
see color picture - see also gravy train
in train
Brit formal :in an active state or condition
verb
trains; trained; training
[+ obj] :to teach (someone) the skills needed to do something (such as a job) :to give instruction to (someone)
[no obj] :to be taught the skills needed to do something (such as a job)
[+ obj] :to cause (someone or something) to develop an ability or skill
[no obj] :to try to make yourself stronger, faster, or better at doing something before competing in an event or competition
[+ obj] :to help (someone) to prepare for an event or competition :to coach (an athlete)
[+ obj] :to teach (an animal) to obey commands
[+ obj] :to make (a plant) grow in a particular direction usually by bending, cutting, or tying it
[+ obj] :to aim or point (something) toward something or in a particular direction