Difference between Massive and Big

Massive

Part of speech: adjective

Definition: Of or pertaining to a large mass; weighty, heavy, or bulky. Much larger than normal. Of great significance or import; overwhelming. Of particularly exceptional quality or value; awesome.

Example sentence: When sustainability is viewed as being a matter of survival for your business, I believe you can create massive change.

Big

Part of speech: noun

Definition: An important or powerful person; a celebrity; a big name.

Part of speech: adjective

Definition: Of a great size; large;Thought to have undue influence.Popular.Adult.Fat.Important or significant.(construed with on) Enthusiastic (about).Mature, conscientious, principled.

Example sentence: Big results require big ambitions.