Rul"er (rûl"ẽr), n.
1. One who rules; one who exercises sway or
authority; a governor.
And he made him ruler over all the
land. Gen. xli. 43.
A prince and ruler of the land.
2. 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
Parallel ruler. See under