n.
1.a series of actions advancing a principle or tending toward a particular end
2.any of the more or less continuous military expeditions in the 11-13th centuries when Christian powers of Europe tried to recapture the Holy Land from the Muslims crusade v.
1.exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person
2.go on a crusade
Idiom of the Day
trial and error
a way of solving a problem by trying different possible solutions until you find one that works
We worked by trial and error until we found a solution to the parking problems at our apartment building.