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matter all substances that contain atoms and take up space. [5 definitions]
mattress a large pad that supports the body while sleeping, made of a strong fabric filled with soft material such as cotton, hair, straw, or foam rubber.
mature fully grown. [4 definitions]
maul a heavy hammer, sometimes with a wooden head, used to drive stakes, piles, or the like. [2 definitions]
Mauritania a country in western Africa. Nouakchott is the capital of Mauritania.
Mauritius an island country in the Indian Ocean lying to the east of Madagascar. The capital of Mauritius is Port Louis.
mauve the color that comes from mixing blue, purple, and white paint.
maximum the largest possible amount or number. [2 definitions]
May the fifth month of the year. May has thirty-one days.
may to be allowed to. [3 definitions]
Maya a member of an ancient Indian civilization of Mexico and Central America that was discovered and destroyed by Europeans in the 1500s. [2 definitions]
maybe perhaps; possibly.
mayfly a delicate insect with two pairs of wings. The mayfly larva may live for several years in a stream, lake, or river. Once it turns into an adult, it lives for only a few hours. [2 definitions]
mayonnaise a thick dressing of oil, vinegar or lemon juice, seasonings, and egg yolks. Mayonnaise is used in salads, sandwiches, and other dishes.
mayor the head of government in a village, town, or city.
Maypole a high pole decorated with flowers and ribbons, around which people dance to celebrate May Day.
maze a complicated network of paths or passages between high walls or thick hedges which are often designed to confuse those who travel through them.
mb an abbreviation for megabyte, or megabytes.
M.B.A. a degree earned in accounting or other areas of business after one or two years of additional courses following college. M.B.A. is an abbreviation for "Master of Business Administration."
MD an abbreviation for Maryland.
M.D. Doctor of Medicine. M.D. is the abbreviation for the Latin words "medicinae doctor."