This week's Word of the Week is, "Volume." noun a collection of written or printed sheets bound together and constituting a book. one book of a related set or series. a set of issues of a periodical, often covering one year. History\/Historical. a roll of papyrus, parchment, or the like, or of manuscript. the amount of space, measured in cubic units, that an object or substance occupies. a mass or quantity, especially a large quantity, of something: a volume of mail. amount; total: the volume of sales. the degree of sound intensity or audibility; loudness: to turn up the volume on a radio. fullness or quantity of tone. Idioms 10. speak volumes, a. to be very evident or significant: Her testimony spoke volumes. b. to be expressive or meaningful: Your eyes speak volumes.