let-down

  1. (countable) A disappointment or anticlimax.
  2. (countable, uncountable) The neurohormonal release of milk in dairy cows or in breastfeeding human mothers.
  3. (countable, uncountable) The clearance of an aircraft to descend through clouds to clear air below, or the process of granting such a clearance.

Pronounced as (IPA)
/ˈlɛtdaʊn/
Etymology

Deverbal from let down.

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