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dumb down

B2 informal separable transitive
In simple words

To make something easier to understand by removing difficult or complex parts, but usually in a way that makes it less good.

Literal meaning: To make something 'dumb' (less intelligent) and bring it 'down' to a lower level — the metaphor is fairly transparent.

Meanings

1 B2 idiomatic informal

To make information, content, or language simpler and less intellectually demanding, often at the expense of accuracy or depth.

"Critics accused the documentary of dumbing down complex scientific topics to attract a wider audience."

"There is a worry that we are dumbing down the curriculum."

— Common formulation in British educational policy debate; representative of widespread journalistic usage.
Grammar: separable
2 B2 idiomatic informal

(Intransitive) For standards, content, or cultural output to become progressively less intellectually demanding over time.

"Many parents worry that television is dumbing down, offering less educational content than before."

Grammar: inseparable
Usage notes

Almost always used with a negative connotation. Common in discussions about education, media, politics, and culture. Frequently used as criticism of television, textbooks, or political speeches. Both British and American English. Can also be used intransitively ('standards are dumbing down').

Commonly used with

curriculum content media news education textbook debate

Forms

Base
dumb down
I/you/we/they
3rd person
dumbs down
he/she/it
Past simple
dumbed down
yesterday
Past participle
dumbed down
have + pp
-ing form
dumbing down
continuous

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