<p><strong>Noun</strong></p><ul><li>A decrease in volume, force, energy, etc.: a letdown in sales; a general letdown of social barriers.</li><li>Disillusionment, discouragement, or disappointment: The job was a letdown.</li><li>Depression; deflation: He felt a terrible letdown at the end of the play.</li><li>The accelerated movement of milk into the mammary glands of lactating mammals upon stimulation, as by massage or suckling.</li><li>Aeronautics: the descent of an aircraft from a higher to a lower altitude preparatory to making an approach and landing or to making a target run or the like.</li></ul><p><strong>End of Response</strong></p>