/ Thesaurus / M Synonyms of musical instrument digital interface Find synonyms for: Noun1. musical instrument digital interface, MIDI, protocol, communications protocolusage: a standard protocol for communication between electronic musical instruments and computersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language