obese UK /əʊˈbiːs/US /oʊˈbis/adjective 1noun 1forms 5 adjective1 •Extremely overweight, especially: weighing more than 20% (for men) or 25% (for women) over their conventionally ideal weight determined by height and build; or, having a body mass index over 30 kg/m².The president, being 74, a man and someone categorised as obese, is in a higher-risk category for Covid-19. — 2020 noun1 •A person who is obese.Despite a large scattering of HR decay rate, even present in healthy subjects, a ₂ and ΔHR were significantly lower in obeses and COPDs. — 2009 formsobeses · more obese · obeser · most obese · obesest