/ ˈmæsɪv; NAmE / adjective
1.
very large, heavy and solid :
a massive rock
the massive walls of the castle
2.
extremely large or serious :
The explosion made a massive hole in the ground.
a massive increase in spending
He suffered a massive heart attack.
( BrE , informal )
Their house is massive.
They have a massive great house.
► mas·sive·ly adverb
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WORD ORIGIN
late Middle English : from French massif , -ive , from Old French massis , based on Latin massa , from Greek maza barley cake.