n.

1. public transport provided by a line of railway cars coupled together and drawn by a locomotive;
   railroad train
   
   • express trains don't stop at Princeton Junction
2. a sequentially ordered set of things or events or ideas in which each successive member is related to the preceding;
   string
   
   • a string of islands
   • train of mourners
   • a train of thought
3. a procession (of wagons or mules or camels) traveling together in single file;
   caravan, wagon train
   
   • we were part of a caravan of almost a thousand camels
   • they joined the wagon train for safety
4. a series of consequences wrought by an event
   
   • it led to a train of disasters
5. 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. wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed;
   gearing, gear, geartrain, power train
   
   • the fool got his tie caught in the geartrain

v.

1. create by training and teaching;
   develop, prepare, educate
   
   • The old master is training world-class violinists
   • we develop the leaders for the future
2. undergo training or instruction in preparation for a particular role, function, or profession;
   prepare
   
   • She is training to be a teacher
   • He trained as a legal aid
3. train by instruction and practice; especially to teach self-control;
   discipline, check, condition
   
   • Parents must discipline their children
   • Is this dog trained?
4. prepare   (someone) for a future role or function;
   prepare, groom
   
   • 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. train to be discriminative in taste or judgment;
   educate, school, cultivate, civilize, civilise
   
   • Cultivate your musical taste
   • Train your tastebuds
   • She is well schooled in poetry
6. aim or direct at; as of blows, weapons, or objects such as photographic equipment;
   aim, take, take aim, direct
   
   • 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. teach and supervise (someone); act as a trainer or coach (to), as in sports;
   coach
   
   • He is training our Olympic team
   • She is coaching the crew
8. exercise in order to prepare for an event or competition
   
   • She is training for the Olympics
9. train to grow in a certain way by tying and pruning it
   
   • train the vine
10. travel by rail or train;
    rail
    
    • They railed from Rome to Venice
    • She trained to Hamburg
11. drag loosely along a surface; allow to sweep the ground;
    trail
    
    • The toddler was trailing his pants
    • She trained her long scarf behind her