| ruff |
a high, round, stiff collar of pleated or ruffled fabric worn by men and women in the sixteenth and seventeenth centuries. [3 definitions] |
| ruffed grouse |
a North American game bird with tufted neck feathers that resemble a collar or ruff. |
| ruffian |
one who is tough and violent; bully; thug. |
| ruffle |
to disturb the smoothness or evenness of; agitate or ripple. [9 definitions] |
| rufiyaa |
the chief monetary unit of the Maldives, equaling one hundred laris; rupee. |
| rufous |
of or pertaining to a reddish or reddish brown color. |
| rug |
a piece of fabric, usu. of thick, woven material, used to cover part of a floor. [2 definitions] |
| rugby |
a team sport similar to football in which an oval-shaped ball is passed, kicked, and carried, and the play is continuous throughout the two forty-minute halves. |
| rugged |
having a surface that is rough, broken, or jagged. [6 definitions] |
| rugosa rose |
a variety of hardy rose having very thorny stems and rough leaves, often used for hedges. |
| ruin |
complete destruction or decay. [10 definitions] |
| ruination |
the act of ruining or the state of being ruined. [2 definitions] |
| ruinous |
causing or tending to cause ruin. [2 definitions] |
| rule |
a code, law, or principle that governs conduct, as in legislative or sports activities. [13 definitions] |
| Rule 22 |
the rule of the U.S. Senate that lists the precedence of U.S. Senate motions and describes the procedure for ending a filibuster. [2 definitions] |
| rulebook |
a book or pamphlet containing the official rules governing a sport, game, organization, and the like. [2 definitions] |
| ruleless |
combined form of rule. |
| rule of three |
the method of finding the fourth term of a mathematical proportion when three terms are given, the product of the first and fourth terms being equal to the product of the second and third. |
| rule of thumb |
a useful general principle or method based on practical experience rather than scientific proof. |
| rule out |
to remove from consideration. |
| ruler |
one who rules or governs. [2 definitions] |