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dumber than a rock. In DICTIOUS you will not only get to know all the dictionary meanings for the word
dumber than a rock, but we will also tell you about its etymology, its characteristics and you will know how to say
dumber than a rock in singular and plural. Everything you need to know about the word
dumber than a rock you have here. The definition of the word
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dumber than a rock, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.
English
Adjective
dumber than a rock (comparative form only)
- Extremely stupid.