Train can be used as both a noun and a verb in English.
As a noun, it primarily refers to:
1. A series of connected railway cars pulled by a locomotive
2. A sequence of connected events, thoughts, etc.
3. A long piece of material trailing behind a dress
4. A series of military vehicles moving together
As a verb, it means:
1. To teach skills to someone
2. To prepare physically for a sport
3. To aim or point something at a target