n. The act of suppressing, crushing, or quelling, or the state of being suppressed, crushed, quelled, or the like: as, the suppression of a riot, insurrection, or tumult.n. The act of concealing or withholding from utterance, disclosure, revelation, or publication: as, the suppression of truth, of evidence, or of reports.n. The stoppage or obstruction or the morbid retention of discharges: as, the suppression of a diarrhea, of saliva, or of urine.n. In botany, the absence, as in flowers, of parts requisite to theoretical completeness; abortion.n. In psychology, a phenomenon of binocular vision, consisting in the exclusive predominance of a single monocular image and the consequent disappearance of the other.