MIDI Look up MIDI at Dictionary.com
1983, acronym for Musical Instrument Digital Interface.
Midi Look up Midi at Dictionary.com
"southern France," 1883, from French midi "south," literally "midday" (12c.), from mi "middle" (from Latin medius "middle;" see medial (adj.)) + di "day" (from Latin dies, from PIE root *dyeu- "to shine"). Also compare meridian.