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1. (psychology) perception of or reaction to a stimulus that occurs without awareness or consciousness.
   "Subliminal perception or cognition is a subset of unconscious cognition where the forms of unconscious cognition also include attending to one signal in a noisy environment while unconsciously keeping track of other signals (e.g one voice out of many in a crowded room) and tasks done automatically (e.g. driving a car).";
   - subception

Type of: aesthesis, esthesis [US], sensation, sense datum, sense experience, sense impression

Encyclopedia: Subliminal perception