| Abbreviation | Definition |
|---|---|
| MEC | Mountain East Conference |
| MECC | Maastricht Exhibition Conference Centre |
| MECC | Meetings Events Conference Coordinators |
| MECC | Michigan Environmental Compliance Conference |
| MECC | Midwest Environmental Compliance Conference |
| MEDC | Mobile and Embedded Developers Conference |
| MELCON | Mediterranean ELectrotechnical CONference |
| MEMA | Middle East Medical Assembly |
| MEMSYS | IEEE (Institute of Electrical and Electronics Engineers) Micro Electro-Mechanical SYStems Workshop |
| MENC | Music Educators National Conference |
| MEOC | Midwest Election Officials Conference |
| MEPC | Midwest Energy Policy Conference |
| MES | Midsize Enterprise Summit |
| MESOC | Middle East Special Operations Commanders Conference |
| MESPP | IEEE (Institute of Electrical and Electronics Engineers) Conference on Managing Expert System Programs & Projects |
| METC | Midwest Education Technology Conference |
| METRIC | Software METRICs Symposium |
| METS | Marine Equipment Trade Show |
| MEUC | Model European Union Conference |
| MFAS | Midwest Filipino American Summit |