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| thresh·old [ thré shld ] (plural thresh·olds) |
noun |
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| Definition: |
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1. starting point: the point at which something begins or changes
 on the threshold of maturity
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2. level at which effect starts: the level that must be reached for a psychological or physiological effect to begin or be noticeable
 the threshold of consciousness
 her pain threshold
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3. wood or stone below door: a piece of stone or hardwood that forms the bottom of a doorway
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4. entrance: a doorway or entrance
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| [ Old English þerscold< Germanic] |