The noun train has 6 senses (first 2 from tagged texts)
1. (24) train, railroad train -- (public transport provided by a line of railway cars coupled together and drawn by a locomotive; "express trains don't stop at Princeton Junction")
2. (1) string, train -- (a sequentially ordered set of things or events or ideas in which each successive member is related to the preceding; "a string of islands"; "train of mourners"; "a train of thought")
3. caravan, train, wagon train -- (a procession (of wagons or mules or camels) traveling together in single file; "we were part of a caravan of almost a thousand camels"; "they joined the wagon train for safety")
4. train -- (a series of consequences wrought by an event; "it led to a train of disasters")
5. train -- (piece of cloth forming the long back section of a gown that is drawn along the floor; "the bride's train was carried by her two young nephews")
6. gearing, gear, geartrain, power train, train -- (wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed; "the fool got his tie caught in the geartrain")
Overview of verb train
The verb train has 11 senses (first 8 from tagged texts)
1. (14) train, develop, prepare, educate -- (create by training and teaching; "The old master is training world-class violinists"; "we develop the leaders for the future")
2. (9) train, prepare -- (undergo training or instruction in preparation for a particular role, function, or profession; "She is training to be a teacher"; "He trained as a legal aid")
3. (5) discipline, train, check, condition -- (train by instruction and practice; especially to teach self-control; "Parents must discipline their children"; "Is this dog trained?")
4. (5) prepare, groom, train -- (prepare (someone) for a future role or function; "He is grooming his son to become his successor"; "The prince was prepared to become King one day"; "They trained him to be a warrior")
5. (1) educate, school, train, cultivate, civilize, civilise -- (train to be discriminative in taste or judgment; "Cultivate your musical taste"; "Train your tastebuds"; "She is well schooled in poetry")
6. (1) aim, take, train, take aim, direct -- (aim or direct at; as of blows, weapons, or objects such as photographic equipment; "Please don't aim at your little brother!"; "He trained his gun on the burglar"; "Don't train your camera on the women"; "Take a swipe at one's opponent")
7. (1) coach, train -- (teach and supervise (someone); act as a trainer or coach (to), as in sports; "He is training our Olympic team"; "She is coaching the crew")
8. (1) train -- (exercise in order to prepare for an event or competition; "She is training for the Olympics")
9. train -- (train to grow in a certain way by tying and pruning it; "train the vine")
10. train, rail -- (travel by rail or train; "They railed from Rome to Venice"; "She trained to Hamburg")
11. trail, train -- (drag loosely along a surface; allow to sweep the ground; "The toddler was trailing his pants"; "She trained her long scarf behind her")