The definition of a threshold is the entrance or start of something.
(noun)See threshold in Webster's New World College Dictionary
noun
Origin: ME threschwold < OE therscwold (akin to ON threskǫlder) < base of therscan (see thrash) + ?
See threshold in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English thresshold
Origin: , from Old English therscold, threscold; see terə-1 in Indo-European roots
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