The term 'WEB MISSIVE' is a combination of two words, 'WEB' and 'MISSIVE'. WEB refers to the World Wide WEB, which is an interconnected network of computers that allows users to access information from around the world. A MISSIVE is a written message, usually sent by mail or courier. Therefore, a WEB MISSIVE is a written message sent over the internet. The crossword solution for this term is 'email', which is an electronic message sent over the internet.