Definition: [adjective] (of a person or their behaviour) brave; heroic.
Example: she had made gallant efforts to pull herself together
Definition: [adjective] (of a man) charmingly attentive and chivalrous to women.
Example: a gallant gentleman came over and kissed my hand
Definition: [noun] a man who is charmingly attentive to women.
Example: he launches himself into a gallant's career of amorous intrigue
Definition: [verb] (of a man) flirt with (a woman).
Example: Mowbray was gallanting the Polish lady