1. Impeccably clean; spotless. See synonyms at clean.
2. Free from stain or blemish; pure.
3. Free from fault or error: an immaculate record.
4. Having no markings.
It's amazing that while Carolyn always appears immaculate, her apartment often seems very dirty.
Don't expect a child to come home from a birthday party with immaculate clothing. Children usually manage to get as much birthday cake on their clothing as in their mouths.