| Abbreviation | Definition |
|---|---|
| LMMM | Lockwood Mathews Mansion Museum |
| LMNA | Lucas Museum of Narrative Art |
| LMOA | Lotte Museum Of Art |
| LMOP | Lianzhou Museum of photography |
| LMSP | Latino Museum Studies Program |
| LNDM | Lange Nacht Der Museen (German: long night of the museums) |
| LSM | Louisiana State Museum |
| LSSM | Large Scale Systems Museum |
| LUMA | Loyola University Museum of Art |
| LUMENS | Living Urban Museum of Electric and Neon Signs |
| LVAM | Las Vegas Art Museum |
| LWSM | Little White School Museum (Oswego, IL) |
| LYWAM | Leigh Yawkey Woodson Art Museum (Wausau, WI) |
| MAA | Museum Of Animal Accomplishment |
| MAAF | Museum of Australian Army Flying |
| MAAH | Charles H. Wright Museum of African American History |
| MAAH | Museum Of African American History |
| MAAM | Mid Atlantic Air Museum |
| MAAM | Mid Atlantic Association of Museums |
| MAAM | Mid Atlantic Aviation Museum |