a decrease in volume, force, energy, etc.:
a letdown in sales; a general letdown of social barriers.
disillusionment, discouragement, or disappointment:
The job was a letdown.
He felt a terrible letdown at the end of the play.
the accelerated movement of milk into the mammary glands of lactating mammals upon stimulation, as by massage or suckling.
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.
also let-down, “disappointment,” 1768, from let (v.) + down (adv.). The verbal phrase is from mid-12c. in a literal sense; figuratively by 1795.
- Let down easy
see under let someone down
- Let drop
Also, let fall. Utter a word or hint, either casually or inadvertently. For example, He let drop the fact that he’d decided to run for office, or She let fall some bits of gossip about the other teachers. [ Late 1500s ]
- Let floating
programming A program transformation used in functional programming to implement full laziness. E.g. the function f x = x + sqrt 4 can be expressed as f x = let t = sqrt 4 in x + t but note that t does not depend on the argument x so we can automatically transform this […]
- Let george do it
sentence Let someone else besides me take care of it [1910+; perhaps fr a learned journalist’s recall of the French laissez faire a` Georges, ”let George do it,” referring to Cardinal Georges d’Amboise, a church and government official under Louis XII in the late 15th and early 16th centuries]