- mausoleum: A tomb of more than ordinary size or architectural pretensions.
- mawkish: Sickening or insipid.
- maxim: A principle accepted as true and acted on as a rule or guide.
- maze: A labyrinth.
- mead: A meadow.
- meager: scanty.
- mealy-mouthed: Afraid to express facts or opinions plainly.
- meander: To wind and turn while proceeding in a course.
- mechanics: The branch of physics that treats the phenomena caused by the action of forces.
- medallion: A large medal.
- meddlesome: Interfering.
- medial: Of or pertaining to the middle.
- mediate: To effect by negotiating as an agent between parties.
- medicine: A substance possessing or reputed to possess curative or remedial properties.
- medieval: Belonging or relating to or descriptive of the middle ages.
- mediocre: Ordinary.
- meditation: The turning or revolving of a subject in the mind.
- medley: A composition of different songs or parts of songs arranged to run as a continuous whole.
- meliorate: To make better or improve, as in quality or social or physical condition.
- mellifluous: Sweetly or smoothly flowing.
- melodious: Characterized by a sweet succession of sounds.
- melodrama: A drama with a romantic story or plot and sensational situation and incidents.
- memento: A souvenir.
- memorable: Noteworthy.
- menace: A threat.
- menagerie: A collection of wild animals, especially when kept for exhibition.
- mendacious: Untrue.
- mendicant: A beggar.
- mentality: Intellectuality.
- mentor: A wise and faithful teacher, guide, and friend.
- mercantile: Conducted or acting on business principles; commercial.
- mercenary: Greedy
- merciful: Disposed to pity and forgive.
- merciless: Cruel.
- meretricious: Alluring by false or gaudy show.
- mesmerize: To hypnotize.
- messieurs: pl. Gentlemen.
- metal: An element that forms a base by combining with oxygen, is usually hard, heavy, and lustrous.
- metallurgy: The art or science of extracting a metal from ores, as by smelting.
- metamorphosis: A passing from one form or shape into another.
- metaphor: A figure of speech in which one object is likened to another, by speaking as if the other.
- metaphysical: Philosophical.
- metaphysician: One skilled in metaphysics.
- metaphysics: The principles of philosophy as applied to explain the methods of any particular science.
- mete: To apportion.
- metempsychosis: Transition of the soul of a human being at death into another body, whether human or beast.
- meticulous: Over-cautious.
- metonymy: A figure of speech that consists in the naming of a thing by one of its attributes.
- metric: Relating to measurement.
- metronome: An instrument for indicating and marking exact time in music.