massive /ˈmæs.ɪv/adjective 9noun 2forms 3 adjective9 •extremely big in size, amount or effectCompared to its counterparts from World War II, the Abrams main battle tank is truly massive.The Enlightenment involved massive shifts in many areas of Western thought. •Affecting a large portion of the body, or severe. •(informal) To a very great extent; total, utter.Notwithstanding Catherine's assurances, I was apprehensive about meeting Denys, worried that I would come off as a massive idiot […] — 2007 •Substantial in mass; bulky, heavy and solid.A massive comet or asteroid appears to have ended the era of the dinosaurs. •(informal) Of particularly exceptional quality or value; awesome.Did you see Colbert last night? He was massive! •(Ireland, informal) Outstanding, beautiful.Your dress is massive, love. Where did you get it? •Having any mass.Some bosons are massive while others are massless. •Homogeneous, unstructured. •Not having an obvious crystalline structure. noun2 •(slang) A group of people from a locality, or sharing a collective aim, interest, etc.Big up to the Croydon massive! •A homogeneous mass of rock, not layered and without an obvious crystal structure. formsmassives · more massive · most massive