1. people who campaign vigorously for a cause they believe in
2. Christian warriors who participated in the medieval military expeditions to recover the Holy Land from Muslim control
Usage: historical

Examples

• The environmental crusaders organized protests against the new factory.
• She joined the crusaders fighting for educational reform.
• Medieval crusaders traveled thousands of miles to reach Jerusalem.
• The crusaders wore crosses on their armor and clothing.
• Modern crusaders for social justice use different tactics than their predecessors.
• The crusaders faced many hardships during their long journey.
• Anti-poverty crusaders lobbied Congress for increased funding.