Crusade -
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
crusade -
a series of actions advancing a principle or tending toward a particular end; "he supported populist campaigns"; "they worked in the cause of world peace"; "the team was ready for a drive toward the pennant"; "the movement to end slavery"; "contributed to the war effort"
lost cause a defeated cause or a cause for which defeat is inevitable
reform a change for the better as a result of correcting abuses; "justice was for sale before the reform of the law courts"
war a concerted campaign to end something that is injurious; "the war on poverty"; "the war against crime"
Verb
crusade -
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"; "She is crusading for women's rights"; "The Dean is pushing for his favorite candidate"
crusade -
Any of the military expeditions undertaken by the Christians of Europe in the 11th to 13th centuries to reconquer the Levant from the Muslims.
crusade -
A grand concerted effort toward some purportedly worthy cause.