What does "ruler" mean?
A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings.
noun, verb ·Common ·High school level
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"The carcharhinids are unquestionably the rulers of the seas, because of their abundance, their strength and speed, and their unchallenged position as the number one predators in the marine ecosystem."
"Alfred, King of England, was a great scholar as well as a great ruler."
A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings.
Common synonyms include: a per se, ace, akbar, ameer, amir, amirs.
Alfred, King of England, was a great scholar as well as a great ruler.
Pronounced /ˈɹuːlə(ɹ)/.
From Middle English reuler; equivalent to rule + -er.