Chivalry refers to the medieval knightly system that emphasized ideals such as bravery, honor, and courtly love. It encompassed a code of conduct for knights, which included loyalty to one's lord, protection of the weak, and respect for women. Over time, the concept has evolved to represent a broader notion of courteous behavior and moral integrity in social interactions. Today, chivalry often evokes traditional notions of gallantry and respect, especially in romantic contexts.