threshold [thresh-ohld, thresh-hohld]
noun
1. the sill of a doorway.
2. the entrance to a house or building.
3. any place or point of entering or beginning: the threshold of a new career.
4. Also called limen. Psychology, Physiology. the point at which a stimulus is of sufficient intensity to begin to produce an effect: the threshold of consciousness; a low threshold of pain.
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Origin: before 900; Middle English threschold, Old English threscold, threscwald; cognate with Old Norse threskǫldr, dialectal Swedish träskvald; akin to thresh in old sense “trample, tread”; -old, -wald unexplained
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