1. theatine - Noun
2. theatine - Adjective
One of an order of Italian monks, established in 1524, expressly to oppose Reformation, and to raise the tone of piety among Roman Catholics. They hold no property, nor do they beg, but depend on what Providence sends. Their chief employment is preaching and giving religious instruction.
One of an order of nuns founded by Ursula Benincasa, who died in 1618.
Source: Webster's dictionary