Definitions For Crusade

noun

• A series of actions advancing a principle or tending toward a particular end
• Any of the more or less continuous military expeditions in the 11th to 13th centuries when Christian powers of Europe tried to recapture the Holy Land from the Muslims
• Any one of the wars that European Christian countries fought against Muslims in Palestine in the 11th, 12th, and 13th centuries
• A major effort to change something

verb

• Go on a crusade; fight a holy war
• Exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for
• To take part in a major effort to change something