A straight and slender stick; a wand; hence, any slender bar, as of wood or metal (applied to various purposes). Specifically:
(a)
An instrument of punishment or correction; figuratively, chastisement. "He that spareth his rod hateth his son."
(b)
A kind of sceptor, or badge of office; hence, figuratively, power; authority; tyranny; oppression. "The rod, and bird of peace."
(c)
A support for a fishing line; a fish pole.
(d)
(Mach. & Structure) A member used in tension, as for sustaining a suspended weight, or in tension and compression, as for transmitting reciprocating motion, etc.; a connecting bar.
(e)
An instrument for measuring.