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
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; "The liberal party pushed for reforms"; "She is crusading for women's rights"; "The Dean is pushing for his favorite candidate"
workplace for the teaching or practice of an art; "she ran a dance studio"; "the music department provided studios for their students"; "you don't need a studio to make a passport photograph"
workplace consisting of a room or building where movies or television shows or radio programs are produced and recorded