Definitions
1.AdjectiveOf a stimulus: below the limen or threshold of conscious perception, especially if still able to produce a response; also , below the threshold where a response can be produced. .mw-parser-output .defdate{font-size:smaller}
2.AdjectiveWithout directed awareness or thought; subconscious , unconscious.
3.AdjectiveOf an advertisement, a message, etc.: conveyed in a manner that a person is unaware of being influenced by it.
4.NounChiefly preceded by the: something which is below the limen or threshold of conscious perception.
5.NounChiefly preceded by the: the subconscious or unconscious self.
6.NounAn advertisement, a message, etc., which is conveyed in a manner that a person is unaware of being influenced by it.
7.NounAn audio or video recording, often consisting of ambient music or white noise with hidden affirmations, intended to produce physical or psychological changes in the listener through repetition."She spent all night listening to a subliminal to change her eye color."