Impeccably clean; spotless. See Synonyms at clean.
Free from stain or blemish; pure.
Free from fault or error: an immaculate record.
Having no markings.
[Middle English immaculat, from Latin immaculātus : in-, not; see in-1 + maculātus, past participle of maculāre, to blemish (from macula, spot).] im·mac'u·late·ly adv., im·mac'u·late·ness n.
c.1430, "free from mental or moral pollution, pure," from a fig. use of L. immaculatus "unstained," from in- "not" + maculatus "spotted, defiled," pp. of maculare "to spot," from macula "spot, blemish." The literal sense of "spotlessly clean or neat" is first attested 1735. Immaculate Conception is 1497, from M.Fr. conception immaculée; declared to be an article of faith in 1854.