let·​down | \ ˈlet-ˌdau̇n How to pronounce letdown (audio) \

Definition of letdown

 (Entry 1 of 2)

1a : discouragement, disappointment his latest novel is a letdown
b : a slackening of effort : relaxation
2 : the descent of an aircraft or spacecraft to the point at which a landing approach is begun
3 : a physiological response of a lactating mammal to suckling and allied stimuli whereby previously secreted milk from the acini is expelled into ducts and drawn through the nipple

let down

let down; letting down; lets down

Definition of let down (Entry 2 of 2)

transitive verb

1 : to allow to descend gradually
2a : to fail to support felt her parents had let her down
b : disappoint the plot lets you down at the end afraid of letting his father down

Keep scrolling for more

Synonyms & Antonyms for letdown

Synonyms: Noun

disappointment, dismay, dissatisfaction, frustration

Synonyms: Verb

cheat, disappoint, dissatisfy, fail

Antonyms: Noun

content, contentedness, contentment, gratification, satisfaction

Antonyms: Verb

content, gratify, satisfy

Visit the Thesaurus for More 

Examples of letdown in a Sentence


the museum exhibit was just so-so, and we returned home with a vague sense of letdown the eagerly anticipated new movie starring our favorite actor turned out to be a big letdown


with my poor performance I really felt that I had let my teammates down
See More

Recent Examples on the Web: Noun

Amid a letdown season, allow Kyle Newman to make a bold prediction about Rockies’ all-star shortstop Trevor Story. Kyle Newman, The Denver Post, "Rockies Insider: Imagining the lineup for a Colorado media baseball team," 8 Aug. 2019 Studies prove significant and prolonged stress can inhibit the letdown reflex and milk production. Washington Post, "Six things I’ve learned about making breast-feeding accessible for all," 2 Aug. 2019 The second-quarter letdown announced Wednesday comes after Netflix attracted nearly 10 million subscribers during the first three months of the year, more than any other quarter since the debut of its video streaming service 12 years ago. Michael Liedtke, Fortune, "Netflix Stock Plunges 12% After Reporting Slowdown in Subscription Growth," 17 July 2019 Wilder easily put aside the letdown of not fighting Joshua or Fury again because of his anger toward Breazeale over an altercation involving family members at an Alabama hotel in 2017. Brian Mahoney, The Seattle Times, "Wilder KOs Breazeale in 1st round to defend heavyweight belt," 19 May 2019 The last time Kenyan Drake was the featured back of an offense was his high school days at Hillgrove High, and those expecting Miami to put more on his plate this season might be setting themselves up for a letdown. Omar Kelly, sun-sentinel.com, "Dolphins training camp Day 2: Stock up, stock down and other observations," 26 July 2019 If this episode sounds like the setup to a salacious industry tell-all or rings of the workplace scandals involving Matt Lauer and Louis C.K., readers are doomed for a letdown. Pete Tosiello, Washington Post, "Karen Dukess’s ‘The Last Book Party’ is a postcard from another era," 10 July 2019 Despite Sunday’s letdown, Bowden dominated as the Yard Goats’ closer, converting all 20 of his save opportunities before being promoted to Albuquerque on June 20. Kyle Newman, The Denver Post, "Rockies’ pitching prospect Ben Bowden blows save in 2019 MLB all-star Futures Game," 7 July 2019 Despite considerable hype, the show was a letdown, and ended with a main event between The Undertaker and Bill Goldberg that the company would rather soon forget. Justin Barrasso, SI.com, "Undertaker-Goldberg Was the Nadir of an Eventful Weekend in Wrestling," 10 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'letdown.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of letdown


1768, in the meaning defined at sense 1a


12th century, in the meaning defined at sense 1

Keep scrolling for more

Learn More about letdown

Statistics for letdown

Last Updated

20 Aug 2019

Look-up Popularity

Time Traveler for letdown

The first known use of letdown was in the 12th century

See more words from the same century

Keep scrolling for more

More Definitions for letdown



English Language Learners Definition of letdown

: something that is not as good as it was expected to be


let·​down | \ ˈlet-ˌdau̇n How to pronounce letdown (audio) \

Kids Definition of letdown


\ ˈlet-ˌdau̇n\

Medical Definition of letdown

 (Entry 1 of 2)

: a physiological response of a lactating mammal to suckling and allied stimuli whereby increased intramammary pressure forces previously secreted milk from the acini and finer tubules into the main collecting ducts from where it can be drawn through the nipple

let down

transitive verb
\ -ˈdau̇n How to pronounce let down (audio) \

Medical Definition of let down (Entry 2 of 2)

: to release (formed milk) within the mammary gland or udder

Keep scrolling for more

More from Merriam-Webster on letdown

Rhyming Dictionary: Words that rhyme with letdown

Thesaurus: All synonyms and antonyms for letdown

Spanish Central: Translation of letdown

Nglish: Translation of letdown for Spanish Speakers

Comments on letdown

What made you want to look up letdown? Please tell us where you read or heard it (including the quote, if possible).


a wrong name or inappropriate designation

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Name That Thing

Test your visual vocabulary with our 10-question challenge!


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!