This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Not in accord with the spirit or principles of Christianity.

adj. Not Christian.

adj. Uncivilized; barbaric.

adj. Not of the Christian faith.

adj. Not in accord with Christian principles; without Christian spirit, unbefitting a Christian.

adj. Not Christian; not converted to the Christian faith; infidel.

adj. Contrary to Christianity; not like or becoming a Christian.

v. To make unchristian.

Not Christian; opposed to Christianity or to its spirit; contrary to Christianity or a Christian character.

Not converted to the Christian faith: as, unchristian nations. Hence Not in accordance with the civilization that Christianity insures; rude; cruel: often used colloquially to signify improper, unusual, and the like.

To deprive of the constituent qualities of Christianity; make unchristian.

adj. not of a Christian faith

"Those that think to excuse themselves in unchristian practices with the Christian name, and sin the more boldly and securely because there is a sin-offering provided, do, in effect, make God's house of prayer a den of thieves, as the priests in Christ's time, Matt. xxi."

christless    nonchristian    unchristlike    unchristianly   

infidel   

ungenerous    unjust    immoral    irreligious    impious