voluminous

Concise Oxford English Dictionary © 2008 Oxford University Press:
voluminous /vəˈljuːmɪnəs/

▶adjective

• 1 (of clothing or drapery) loose and ample.

• 2 (of writing) very lengthy and full.

– derivatives
voluminously adverb,
voluminousness noun.

– origin C17: partly from late L. voluminosus ‘having many coils’, partly from L. volumen (see volume).