adj.1 pure, spotless; perfectly clean.
2 perfectly or extremely well executed (an immaculate performance).
3 free from fault; innocent.
4 Biol. not spotted.
Phrases and idioms:
Immaculate Conception RC Ch. the doctrine that God preserved the Virgin Mary from the taint of original sin from the moment she was conceived.
Derivatives:
immaculacy n. immaculately adv. immaculateness n.
Etymology: ME f. L immaculatus (as IN-(1), maculatus f. macula spot)