let down

British  

verb

1. (also preposition) to lower

2. to fail to fulfil the expectations of (a person); disappoint

3. to undo, shorten, and resew (the hem) so as to lengthen (a dress, skirt, etc)

4. to untie (long hair that is bound up) and allow to fall loose

5. to deflate

   to let down a tyre

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noun

1. a disappointment

2. the gliding descent of an aircraft in preparation for landing

3. the release of milk from the mammary glands following stimulation by the hormone oxytocin

let down Idioms  

1. Cause to descend, lower, as in They let down the sails . [Mid-1100s]

2. Also, let up . Slacken, abate, as in Sales are letting down in this quarter , or They didn't let up in their efforts until the end . The first term dates from the mid-1800s, the variant from the late 1700s.

3. See let someone down . Also see let one's hair down .

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Example Sentences

The mechanics, the engineers, myself, everyone in McLaren, feels let down by what we had as a result.

From BBC

The peril for the Rams now is letting down their guard.

From Los Angeles Times

There’s more at play here than meets the eye, something overlooked after too many years of being let down by Gustav and his many promises.

From Salon

"Vulnerable children and their upset parents have been badly let down," Burrows told BBC News NI.

From BBC

Mr Bradley described the delay as "shocking", adding he felt "let down" that Justice Minister Naomi Long had turned down requests from the families for a meeting.

From BBC