Definitions
1.verbTo draw along as a current does."water entrained by steam"
2.verbTo suspend small particles in the current of a fluid.
3.verbTo set up or propagate a signal, such as an oscillation.
4.verbTo encarriage, to conjoin, to link; as in a series of entities, elements, objects or processes.
5.verb(neurobiology) To become trained or conditioned in a pattern of brain behavior.
6.verbTo get into or board a railway train.
7.verbTo put aboard a railway train."to entrain a regiment"