vo•lu•mi•nousvəˈlu mə nəs(adj.)

1. filling or sufficient to fill a volume or volumes:

   a voluminous correspondence.

2. writing copiously or at great length:

   a voluminous writer.

3. of great volume, size, or extent.

4. having ample folds or fullness:

   voluminous skirts.

5. having many coils, convolutions, or windings.

Origin of voluminous:

1605–15; < LL volūminōsus full of folds, der. of L volūmen (see volume )

vo•lu′mi•nous•ness-ˈnɒs ɪ ti(n.)

vo•lu`mi•nos′i•ty-ˈnɒs ɪ ti(n.)