Source : WordNet®

midi
     adj : used of women's clothing having a hemline at mid-calf;
           "midiskirts"; "wore her dresses midi length" [ant: {maxi},
            {mini}]
     n 1: the south of France
     2: a standard protocol for communication between electronic
        musical instruments and computers [syn: {musical
        instrument digital interface}]

Source : Free On-Line Dictionary of Computing

MIDI
     
        {Musical Instrument Digital Interface}