colossal

Concise Oxford English Dictionary © 2008 Oxford University Press:
colossal/kəˈlɒsl/

▶adjective

• 1 extremely large.

  ■ Sculpture (of a statue) at least twice life size.

• 2 Architecture (of an order) having more than one storey of columns.

– derivatives
colossally adverb.

– origin C18: from Fr., from colosse, from L. colossus (see colossus).