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Meaning of subliminal

sub•lim•i•nal

Pronunciation: (sub-lim'u-nl), [key]
— adj. Psychol.
  1. existing or operating below the threshold of consciousness; being or employing stimuli insufficiently intense to produce a discrete sensation but often being or designed to be intense enough to influence the mental processes or the behavior of the individual: a subliminal stimulus; subliminal advertising.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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