1. adj. a word used to describe a being who displays behavior commonly associated with that of a gentleman
The gentlemanly man (as of August, 26 2015) emerged from his house with an umbrella to escort his lovely girlfriend into the house; despite the rain.
a word used to describe a man (sometimes a cat or dog) who displays mannerisms similar to that of a gentleman
The gentlemanly man (as of August 26, 2015) graciously held the umbrella while escorting his lovely girlfriend inside.