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English Words Starting With M

8,594 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

mefenamic acid
nounlow
/ˌmɛfɪˈnæmɪk ˈæsɪd/A nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain and inflammation.
meff
nounVery Low / Regional Slang
/mɛf/An insulting, derogatory term for a person, typically implying they are unpleasant, foolish, or of low social standing.
mefloquine
nounLow
/ˈmɛflə(ʊ)kwiːn/A synthetic drug used to prevent and treat malaria.
meformer
nounLow
/ˈmiːfɔːmə(r)/A person, especially on social media, who posts primarily about their own life, thoughts, and feelings rather than sharing broader content.
meg
nounB2
/mɛɡ/A colloquial or informal unit meaning one million of something, often used with currency, bytes, or other quantities.
megabit
nounB2
/ˈmeɡəbɪt/A unit of data size equal to 1,048,576 bits (or sometimes 1,000,000 bits in networking contexts), abbreviated as Mb.
megabuck
nounC1
/ˈmeɡəbʌk/One million dollars; a very large sum of money, often used to indicate financial scale.
megabyte
nounC1
/ˈmɛɡəbʌɪt/A unit of digital information equal to 1,048,576 bytes (or 1024 kilobytes), often approximated as one million bytes.
megacephaly
nounC2/Technical
/ˌmɛɡəˈsɛfəli/a medical condition characterized by an abnormally large head
megachurch
nounC1
/ˈmɛɡətʃəːtʃ/An extremely large, usually evangelical Christian church, typically with congregations numbering in the thousands.
megacity
nounC1-C2
/ˈmɛɡəsɪti/A very large city, typically one with a population of over ten million people.
megacorporation
nounC1-C2
/ˈmɛɡəkɔːpəˈreɪʃ(ə)n/An extremely large corporation, typically with immense financial power, global reach, and significant political influence.
megacycle
nounLow (primarily historical/technical)
/ˈmɛɡəˌsʌɪk(ə)l/A unit of frequency equal to one million cycles per second, equivalent to one megahertz (MHz).
megadeal
nounLow
/ˈmɛɡədiːl/An extremely large and complex business transaction or contract, typically involving billions of dollars, significant media rights, or major corporate mergers and acquisitions.
megadeath
nounC2
/ˈmɛɡəˌdɛθ/A unit of measurement, specifically one million human deaths, used in nuclear war scenarios and discussions of mass casualties.
megadontia
nounVery Rare
/ˌmɛɡəˈdɒntɪə/The condition of having unusually large teeth.
megadose
nounC1
/ˈmɛɡəˌdəʊs/A dose of a substance, especially a vitamin or mineral, that is far larger than the usual or recommended amount.
megadrought
nounLow
/ˈmɛɡəˌdraʊt/A prolonged and severe drought lasting for decades or centuries, significantly exceeding the duration and intensity of typical droughts.
megaelectron volt
nounLow
/ˌmɛɡəɪˌlɛktrɒn ˈvəʊlt/A unit of energy equal to one million electron volts, commonly used in particle physics, nuclear physics, and astrophysics to measure the energy of subatomic particles.
megaera
nounVery Low (Archaic/Literary)
/mɪˈdʒɪərə/One of the three Furies (Erinyes) in Greek mythology, representing vengeful anger and punishment.

Showing 3301–3320 of 8594 words.