"a voluminous" is correct and usable in written English.
You can use it to describe something that is large in size or quantity. Example: The library was filled with a voluminous collection of books.
He carried on a voluminous correspondance.
From exile, however, he conducted a voluminous correspondence.
Such a voluminous stash of booze is virtually unheard of.
He was once cannonball-shaped, with a charging gait and a voluminous toupee.
According to Pliny the Elder, Hermippus in Alexandria wrote a voluminous book on Zoroastrianism.
That's a voluminous salon blow-dry, by the way, not an orgasm.
Maimbourg was a voluminous writer, and his collected Histoires (1686 87) include 26 volumes.
A respected orator and a voluminous writer, he tended toward conservatism, opposing alliances with revolutionaries.
Expect clean-lined basics like a dark green blouse with a voluminous back ($105).
It also makes the rear light and airy for what is not a voluminous space.
During the 13th century the story like Arthurian legend was embodied in a voluminous prose romance.
