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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)

mass spectroscope
nounC2
/ˌmæs ˈspek.trə.skəʊp/An instrument used to measure the mass-to-charge ratio of ions in order to identify the composition of a sample.
mass spectrum
nounLow (technical)
/ˌmæs ˈspek.trəm/A plot representing the relative abundances of ions in a sample as a function of their mass-to-charge ratio, produced by a mass spectrometer.
mass transit
nounC1
/ˌmæs ˈtræn.zɪt/A system of public transport for moving large numbers of people in urban areas, typically including buses, trams, subways, and trains.
mass wasting
nounC2
/ˌmæs ˈweɪstɪŋ/The downslope movement of rock, soil, and debris under the direct influence of gravity.
mass-energy
nounLow
/ˌmas ˈɛnədʒi/A fundamental physical concept describing the interchangeable and equivalent nature of mass and energy, as expressed by Einstein's equation E=mc².
mass-energy equation
nounLow
/ˌmæs ˈen.ə.dʒi ɪˈkweɪ.ʒən/A fundamental law of physics, E = mc², stating that mass and energy are equivalent and can be converted into each other.
mass-market
adjectiveverb-transitiveC1
/ˌmæs ˈmɑː.kɪt/Designed for, produced for, or appealing to a very large, general public; intended for widespread sale at a moderate price.
mass-market paperback
nounC1
/ˌmæs ˈmɑːkɪt ˈpeɪpəbæk/A book published in an inexpensive, small-sized paperback format, designed to be sold in large quantities to a general audience.
mass-produce
verbverb-transitiveC1
/ˌmæs prəˈdjuːs/To manufacture (a product) in large quantities, usually using standardized designs and machinery in a continuous process.
massa
nounVery Low (archaic/historical)
/ˈmæsə/(Historical, chiefly US) A way of referring to or addressing a slave master, particularly in the antebellum American South.
massachuset
nounC2 (Very Low Frequency)
/ˌmæsəˈtʃuːsɪt/A Native American tribe historically inhabiting eastern Massachusetts.
massachusett
nounLow
/ˌmæsəˈtʃuːsɪt/A member of a Native American people originally inhabiting the region around Massachusetts Bay in the northeastern United States.
massachusetts
nounLow-Medium
/ˌmæsəˈtʃuːsɪts/A state in the northeastern United States of America, one of the original Thirteen Colonies.
massachusetts ballot
nounLow
/ˌmæsəˈtʃuːsɪts ˈbælət/The official voting document used in elections in the U.S. state of Massachusetts.
massachusetts bay
nounMedium
/ˌmæsəˈtʃuːsɪts ˈbeɪ/A large bay on the Atlantic coast of North America, indenting the eastern shore of the US state of Massachusetts.
massachusetts bay company
nounLow
/ˌmæs.əˌtʃuː.sɪts ˌbeɪ ˈkʌm.pə.ni/A 17th-century English trading and colonisation company chartered to settle and govern the Massachusetts Bay area in New England.
massacre
nounverbverb-transitiveB2 (Upper Intermediate). High frequency in news, historical, and political discourse; lower in everyday conversation.
/ˈmæs.ə.kə(r)/The brutal killing of a large number of people, typically in a sudden, indiscriminate, and violent manner.
massacre of the innocents
nounLow (C2)
/ˈmæs.ə.kər əv ði ˈɪn.ə.sənts/The biblical event, recorded in the Gospel of Matthew, in which King Herod orders the execution of all male infants in Bethlehem in an attempt to kill the newborn Jesus.
massage
nounverbverb-transitiveB1
/ˈmæsɑːʒ/The manipulation of the soft tissues of the body, typically using the hands, to promote relaxation, relieve tension, or treat injury.
massage parlor
nounC1
/ˈmæsɑːʒ ˌpɑːlə/A business establishment where massages are professionally administered to clients.

Showing 2361–2380 of 8594 words.