superliminal adjective2 •Of, pertaining to, or involving conscious awareness; above the threshold of the subconscious.If the illumination is steadily increased from sub-liminal to super-liminal values, the deeply saturated colour will come out from the blackness. — 1924 •(rare) Of, pertaining to, or involving a supposed kind of awareness which is above and beyond the experiential range of normal consciousness. formsmore superliminal · most superliminal