n. 1 single book forming part or all of a work. 2 a solid content, bulk. b space occupied by a gas or liquid. c (foil. by of) amount or quantity. 3 strength of sound, loudness. 4 (foil. by of) a moving mass of water etc. b (usu. in pl.) mass of smoke etc. [Latin volumen: related to VOLUBLE, ancient books being in roll form]
