Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Below the threshold of conscious perception. Used of stimuli.
  • adjective Inadequate to produce conscious awareness but able to evoke a response.

from The Century Dictionary.

  • Subconscious; pertaining to the subliminal self or personality: as, a subliminal memory.
  • noun The subconscious; a supposed secondary self or consciousness below the level of the normal, waking life.
  • Below the threshold of sensation. In the following quotation a similar threshold of consciousness is supposed.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Philos.) Existing in the mind, but below the surface or threshold of consciousness; that is, existing as feeling rather than as clear ideas.
  • adjective having or using an intensity of sensory stimulus insufficient to be perceived consciously, but having an effect on unconscious mental processes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective of a stimulus Below the threshold of conscious perception, especially if still able to produce a response.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective below the threshold of conscious perception

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[sub– + Latin līmen, līmin-, threshold.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Morphologically sub- + Latin līmen ("threshold") (genitive līminis) + -al, a calque of German unterschwellig ("beneath the threshold").

Examples

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