The well-off Orgon is convinced that Tartuffe is a man of great religious zeal and fervor. In fact, Tartuffe is a scheming hypocrite. He is interesting as a character in that he gets around Orgon not by telling lies, but by allowing him to use his power as the master of the household over everyone else. By the time Tartuffe is exposed by Orgon's son, Damis, and Orgon renounces him, Tartuffe has legal control of his finances and family, and is about to steal all of his wealth and marry his daughter — all at Orgon's own invitation. At the very last minute, the king intervenes, and Tartuffe is condemned to prison.
As a consequence, the word tartuffe is used in contemporary French, and also in English, to designate a hypocrite who ostensibly and exaggeratedly feigns virtue, especially religious virtue.
The entire play is written in 12-syllable lines (alexandrines) of rhyming couplets.