[treyn] 
,| 1. | Railroads. a self-propelled, connected group of rolling stock. |
| 2. | a line or procession of persons, vehicles, animals, etc., traveling together. |
| 3. | Military. an aggregation of vehicles, animals, and personnel accompanying an army to carry supplies, baggage, ammunition, etc. |
| 4. | a series or row of objects or parts. |
| 5. | Machinery. a connected set of three or more rotating elements, usually gears, through which force is transmitted, or motion or torque changed. |
| 6. | order, esp. proper order: Matters were in good train. |
| 7. | something that is drawn along; a trailing part. |
| 8. | an elongated part of a skirt or robe trailing behind on the ground. |
| 9. | a trail or stream of something from a moving object. |
| 10. | a line or succession of persons or things following one after the other. |
| 11. | a body of followers or attendants; retinue. |
| 12. | a series of proceedings, events, ideas, etc. |
| 13. | the series of results or circumstances following or proceeding from an event, action, etc.; aftermath: Disease came in the train of war. |
| 14. | a succession of connected ideas; a course of reasoning: to lose one's train of thought. |
| 15. | Astronomy.
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| 16. | a line of combustible material, as gunpowder, for leading fire to an explosive charge. |
| 17. | Physics. a succession of wave fronts, oscillations, or the like. |
| 18. | to develop or form the habits, thoughts, or behavior of (a child or other person) by discipline and instruction: to train an unruly boy. |
| 19. | to make proficient by instruction and practice, as in some art, profession, or work: to train soldiers. |
| 20. | to make (a person) fit by proper exercise, diet, practice, etc., as for an athletic performance. |
| 21. | to discipline and instruct (an animal), as in the performance of tasks or tricks. |
| 22. | to treat or manipulate so as to bring into some desired form, position, direction, etc.: to train one's hair to stay down. |
| 23. | Horticulture. to bring (a plant, branch, etc.) into a particular shape or position, by bending, pruning, or the like. |
| 24. | to bring to bear on some object; point, aim, or direct, as a firearm, camera, telescope, or eye. |
| 25. | to entice; allure. |
| 26. | to give the discipline and instruction, drill, practice, etc., designed to impart proficiency or efficiency. |
| 27. | to undergo discipline and instruction, drill, etc. |
| 28. | to get oneself into condition for an athletic performance through exercise, diet, practice, etc. |
| 29. | to travel or go by train: to train to New York. |
