Meaning, pronunciation, picture, example sentences, … Definition of massive adjective in oxford advanced learners dictionary. How to use massive in a sentence. A massive forehead. The meaning of massive is forming or consisting of a large mass. Bulky and heavy: If you describe a medical condition as massive, you mean that it is extremely serious. Imposingly large or prominent: Consisting of or forming a large mass; A group of people who spend time together and live in…. He died six weeks later of a massive heart attack. Very large in size, amount, or number:

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