Dictionary definition · Crusade
noun
- 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
- a series of actions advancing a principle or tending toward a particular end"he supported populist campaigns"
verb
- 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"The liberal party pushed for reforms"
- go on a crusade; fight a holy war
Source: Open English WordNet (CC BY 4.0).