tightening

Definitions of tightening
  1. noun
    the act of making something tighter
    “the tightening of economic controls”
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    Antonyms:
    laxation, loosening
    the act of making something less tight
    types:
    take-up
    the action of taking up as by tightening or absorption or reeling in
    type of:
    adjustment, alteration, modification
    the act of making something different (as e.g. the size of a garment)
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