heartly UK /ˈhɑːtli/US /ˈhɑɹtli/adjective 1adverb 1forms 4 adjective1 •(rare) Full of heart; cordial; from the heart; hearty‘Oh yes, we’ll probably be wolfing down pasty jambics and swigging away at great black jacks of swingeing ale in no time now,’ he went on heartly. — 1936 adverb1 •(no longer used) In a hearty or heart-felt manner; cordially; heartily formsheartlier · more heartly · heartliest · most heartly