/ vəˈluːmɪnəs; NAmE / adjective ( formal )
1.
( of clothing ) very large; having a lot of cloth
SYN ample :
a voluminous skirt
2.
( of a piece of writing, a book, etc. ) very long and detailed
3.
( of a container, piece of furniture, etc. ) very large :
I sank down into a voluminous armchair.
► vo·lu·min·ous·ly adverb
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WORD ORIGIN
early 17th cent.: partly from late Latin voluminosus having many coils, partly from Latin volumen , volumin- a roll, from volvere to roll.