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Roman numeral a letter used as a number in the ancient Roman number system. The letter I equals 1, V equals 5, X equals 10, L equals 50, C equals 100, D equals 500, and M equals 1,000. In this system, a letter followed by one of equal or lesser value means the two are added; seven is VII, or 5+1+1. A letter followed by one of greater value means that the first is subtracted from the second; four hundred is CD, or 500-100.
romantic having to do with romance. [4 definitions]
Rome the capital city of Italy. [2 definitions]
romp to move about or play in a lively manner. [2 definitions]
roof the surface or covering on the top of a building. [2 definitions]
rook2 a chess piece that can move over any number of empty squares sideways or forward and backward; castle.
rookie a professional athlete in his or her first season on a team. [2 definitions]
room space that is used or available for use. [5 definitions]
roommate a person who shares your room or home. A roommate is someone who is not part of your family.
roomy having plenty of space; large.
roost a perch on which birds rest or sleep, or a place containing such perches. [2 definitions]
rooster an adult male chicken or the male of another closely related bird, such as the pheasant; cock.
root1 the part of a plant that usually grows underground. Roots take up water and nutrients, and hold the plant in the soil. [8 definitions]
root2 to dig or turn over soil. [2 definitions]
root3 to cheer for a team or a person in a contest. [2 definitions]
rope a strong cord of twisted or woven fiber, wire, or similar material. Ropes can be used to tie, pull, or lift. [5 definitions]
rose1 a flower that grows on a plant or vine that has thorns. Roses smell sweet and come in many different colors. [4 definitions]
rose2 past tense of rise.
rosebud the bud of a rose.
Rosh Hashanah a high holy day that celebrates the beginning of the New Year according to the Jewish calendar. Rosh Hashanah takes place on the first day or the first and second days of Tishri.
rosy having a deep pink color. [2 definitions]