| Term | Definition |
| diminutive | very small, smaller than most others of the same type |
| magnanimous | generous; not selfish; fogiving |
| magnify | to enlarge in fact or appearance; to intensify; to exaggerate |
| magnitude | greatness of importance or size; strength or power of an earthquake |
| maximize | to increase to the greatest possible amount |
| microbe | a very small living thing; especially a bacteria; a germ |
| microphone | a device that changes sound waves to electrical impulses so they can be recorded or amplified |
| mince | to cut or chop into small pieces; use mild or polite words |
| minimal | least in amount or degree; smallest possible |
| minuscule | very small in size or importance; barley visible |