massive

Concise Oxford English Dictionary © 2008 Oxford University Press:
massive/ˈmasɪv/

▶adjective

• 1 large and heavy or solid.

• 2 exceptionally large, intense, or severe.

• 3 Geology (of rocks or beds) having no discernible form or structure.

  ■ (of a mineral) not visibly crystalline.

▶noun Brit. informal a group of young people from a particular area: the Bristol massive.

– derivatives
massively adverb,
massiveness noun.

– origin ME: from Fr. massif, -ive, from OFr. massis, based on L. massa (see mass).