Definition of entrains:
(v) :
To draw (something) along as a current does.
(v) :
(chemistry) To suspend (small particles) in the current of a fluid.
(v) :
(mathematics) To set up or propagate (a signal), such as an oscillation.
(v) :
(figuratively) To conjoin, to link; as in a series of entities, elements, objects or processes.
(v) :
(neurobiology) To become trained or conditioned in (a pattern of brain behavior).
(v) :
(poetic, intransitive) To get into or board a railway train.