An instrument consisting of a rule or frame, and a plumb line, by which the batter or slope of a wall is regulated in building.

The principle that anything is acceptable to do, use, wear etc. so long as it is cool.

A rule that limits or forbids the consideration or discussion of a particular topic by members of a legislative or decision-making body.

A rule stating that the use of prior probabilities of 0 or 1 should be avoided, except when applied to statements that are logically true or false, so as to leave room for the possibility that something very unlikely is in fact the case.

(electronics) A rule describing the relationship between the number of external signal connections to a logic block (i.e. the number of "pins") with the number of logic gates in the logic block.

The rule of a monarch characterized by a lack of consultation with the parliamentary body of the state.

(zoology) A rule stating that, within a species of endotherms, more heavily pigmented forms tend to be found in more humid environments.

simple past tense and past participle of rule OK

present participle of rule OK

(poker) The rule of multiplying the number of outs by two to discover one's approximate chance to make one's hand on the river.