Immaculate a. : Without stain or blemish; spotless; undefiled; clear; pure.

Example:
Do Jehovah's Witnesses use the term "Immaculate conception" in a different sense than others?

Taxonomy
Mary, the Immaculate Conception, Immaculate Conception, dogma, doctrine, original sin, Roman Catholic, God, Catholics, Immaculata, the Virgin Mary, the Church, Christ, Mariology, Eve, Roman Catholic doctrine, by God, Jesus.

Defination from the web:
Immaculate Conception is, according to Roman Catholic Dogma, the conception of the Virgin Mary without any stain (macula in Latin) of original sin. ... The Immaculate Conception was solemnly defined as a dogma by Pope Pius IX in his constitution Ineffabilis Deus on 8 December 1854. ...