judicious in one's conduct or speech, especially with regard to respecting privacy or maintaining silence about something of a delicate nature; prudent; circumspect.
2.
showing prudence and circumspection; decorous: a discreet silence.
3.
modestly unobtrusive; unostentatious: a discreet, finely wrought gold necklace.
Origin: 1325–75; Middle English discret < Anglo-French, Old French < Medieval Latin discrētus,Latin: separated (past participle of discernere;see discern), equivalent to dis-dis-1 + crē- separate, distinguish (variant stem of cernere) + -tus past participle suffix
mid-14c., from O.Fr. discret, from L. discretus "separated, distinct," in M.L. "discerning, careful," from pp. of discernere "distinguish" (see discern). Spellings discrete and nativized discreet co-existed until after c.1600, when discreet became the common word for "careful,
prudent," and discrete was maintained in philosophy, medicine, music and other disciplines that remembered L. and tried to stick close to it. Related: Discreetly.