ruler

One, such as a monarch or dictator, that rules or governs.

A straightedged strip, as of wood or metal, for drawing straight lines and measuring lengths.

One who rules or governs; one who exercises dominion or controlling power over others; a person who commands, manages, restrains, or has part in the making or administration of law; one in authority.

A rule; an instrument made of wood, brass, ivory, or the like, with straight edges or sides, by means of which, as a guide, straight lines may be drawn on paper, parchment, or other substance, by passing a pen or pencil along the edge. (See rule, and parallel ruler, under parallel.) When a ruler has the lines of chords, tangents, sines, etc., it is called a scale. See scale.

In engraving, a workman who operates a ruling-machine for ruling in flat tints, etc. See ruling-machine.

In line-engraving, a straight steel bar supported on cleats, to which a socket is so fitted that it slides evenly and steadily backward and forward.

One who rules; one who exercises sway or authority; a governor.

A straight or curved strip of wood, metal, etc., with a smooth edge, used for guiding a pen or pencil in drawing lines. Cf. Rule, n., 7 (a).

See under Parallel.

A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a rule; a straightedge with markings; a measure.