1. Brave, noble, or chivalrous conduct; exceptional courage
The soldier was awarded a medal for his gallantry in battle.
O soldado recebeu uma medalha por sua galantaria em combate.
2. Polite and attentive behavior toward women; courteous charm
He displayed old-fashioned gallantry by opening the door for her.
Ele demonstrou galantaria à moda antiga ao abrir a porta para ela.