late 14c., "not identical, not the same," also "clearly perceptible by sense," past-participle adjective from obsolete distincten (c. 1300) "to distinguish one thing from another; make distinct," from Old French distincter, from Latin distinctus, past participle of distinguere "to separate between, keep separate, mark off" (see distinguish). Meaning "plain and intelligible to the mind" is from c. 1600. Related: Distinctness.