| merle | n. | blackbird | ||
| merlon | n. | upright section of battlement between crenels | ||
| Merry Widow | n. | condom | slang | |
| merryandrew | n. | buffoon, clown; assistant to a mountebank | ||
| mesclun | n. | salad of mixed young greens | ||
| mesentery | n. | membraneous organ attaching intestines to the rear abdominal wall | ||
| messuage | n. | dwelling house along with its outbuildings and attached lands dedicated to household use | ||
| mestizo | n. | mixed race person, esp. a Latin American or Filipino with both native and European ancestry | ||
| metal | v. | to surface a road with broken stone | British | |
| mete | v. | to apportion, to allot | ||
| metempsychosis | n. | transmigration of the soul | ||
| meteoroid | n. | small body moving through space | ||
| methyphobia | n. | fear of alcohol or of drinking or drinkers of alcohol | ||
| metic | n. | foreign resident required to pay tax to live in Ancient Greek city states | ||
| metonymy | n. | rhetorical figure in which a thing or concept is used to refer to a thing with which it is associated or related | ||
| metope | n. | panel between triglyphs in a Doric frieze | architecture | |
| metoposcopy | n. | telling fortunes or reading character from studying lines on the forehead | ||
| mettlesome | adj. | possessing marked vigor and courage | ||
| mews | n. | alley where stables are found; street with houses built from former stables or built to look like stables | ||
| mickle | adj. | much, a large amount | archaic | |
| micturate | v. | to urinate | ||
| micturition | n. | the act of urinating | ||
| midden | n. | dunghill | ||
| midinette | n. | Parisian salesgirl or milliner’s assistant | ||
| militate | v. | to substantially weigh (usu. against) | ||
| milk-toast | n. | breakfast dish made of toasted bread in milk, often served with either salt or sugar | ||
| mill lade | n. | mill race, mill leat | Scots | |
| milt | n. | fish semen; spleen of a breeding animal | ||
| milter | n. | male fish during spawning time | ||
| mim | adj. | demure, primly reticent, pretentiously shy | Scots | |
| minatory | adj. | threatening, menacing | ||
| minced oath | n. | euphemism for objectionable term or phrase formed by replacing taboo element with another word or expression | ||
| mine-run | adj. | average, not special or distinguished in any way, run of the mill | ||
| mingy | adj. | miserly, stingy | ||
| minimus | n. | creature of the smallest size; fifth digit, little finger or toe | ||
| miniver | n. | white fur lining or trim | ||
| minster | n. | church of a monastery; also gen. any large church | ||
| minutia | n. | tiny detail (usu. pl.) | ||
| miosis | n. | excessive contraction of the pupil | ||
| mirabile dictu | adv. | wonderful to relate, incredible as it seems | Latin | |
| misandry | n. | hatred of men | ||
| mischieve | v. | to harm, to inflict loss; to ruin | ||
| misdoubt | v. | to doubt, to disbelieve; to suspect | archaic | |
| misease | n. | misery, discomfort, suffering | archaic | |
| misericord | n. | room in monastery where some relaxation of monastic rules was permitted; small ledge on folding church seat providing support for people standing; small dagger or pike designed for making a killing ‘mercy’ stroke against a wounded enemy | ||
| misgive | v. | to make doubtful or fearful; to suspect, to fear | archaic | |
| misoneism | n. | hatred of novelty or change | ||
| misprize | v. | to undervalue, to be contemptuous of, to fail to appreciate | ||
| missal | n. | book detailing service of mass for a year; prayer-book | ||
| missioner | n. | missionary |
