Voluminous means great in volume, size or number.
Voluminous is an adjective.
Synonyms: enormous, giant, immense, massive.
Antonyms: tiny, wee, sparse, slight, scant, minuscule, skimpy, small.
The voluminous poet composed nine poems in one year.
I expect you to return with voluminous notes from the seminar.
The voluminosity of their correspondence led us to believe that Mr.Ravi and Swapna were madly in love with each other.