(astronomy, physics) A hypothetical class of particle, proposed to explain the dark matter problem.

Very large in size or extent. / Very large or bulky and heavy and solid. / (informal) To a very great extent; total, utter. / (colloquial) Of particularly exceptional quality or value; awesome.

(mineralogy) A homogeneous mass of rock, not layered and without an obvious crystal structure. / (MLE, slang) A group of people from a locality, or sharing a collective aim, interest, etc.

(computing) having many individual or distributed processing units and thus able to carry out many simultaneous calculations

An online computer role-playing game in which a large number of players can interact with one another.

present participle of mass

A bringing together into a mass.

In a massive manner, in a way that appears large, heavy or imposing. / (slang) Greatly.

An elevated area of south-central France.

plural of massif