massive

UK: /ˈmæsɪv/ US: /ˈmæsɪv/ ,(mas′iv)

WordReference Random House Learner's Dictionary of American English © 2026

mas•sive /ˈmæsɪv/   adj. 

1. made up of or forming a large mass:
   the massive columns of the ancient temple.
2. large or prominent:
   a massive forehead.
3. large in amount or degree:
   a massive dose of medicine.

mas•sive•ly, adv. 
mas•sive•ness, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026

mas•sive  (mas′iv), adj. 

1. consisting of or forming a large mass;
   bulky and heavy:
   massive columns.
2. large and heavy-looking:
   a massive forehead.
3. large in scale, amount, or degree:
   a massive breakdown in communications; massive reductions in spending.
4. solid or substantial;
   great or imposing:
   massive erudition.
5. Mineralogy having no outward crystal form, although sometimes crystalline in internal structure.

• Middle French
• 1375–1425; late Middle English (see mass, -ive); replacing Middle English massif

mas′sive•ly, adv. 
mas′sive•ness, mas•siv′i•ty, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

massive / ˈmæsɪv/ adjective

1. (of objects) large in mass; bulky, heavy, and usually solid
2. impressive or imposing in quality, degree, or scope: massive grief
3. relatively intensive or large; considerable: a massive dose
4. (of igneous rocks) having no stratification, cleavage, etc; homogeneous
5. (of sedimentary rocks) arranged in thick poorly defined strata
6. without obvious crystalline structure

Etymology: 15th Century: from French massif, from masse mass

ˈmassively adverb

ˈmassiveness noun