Meaning of subcurrent

sub•cur•rent

Pronunciation: (sub'kûr"unt, -kur"-), [key]
— n.
  1. a not clearly revealed or formulated direction of thought, intention, action, etc., underlying what is manifested: His words, though ostensibly friendly, betrayed a subcurrent of hostility.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.