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Definition of cinderblock
cinderblock
/ˈsɪn.dɚˌblɑːk/
cin · der · block
Plural:cinderblocks
cinderblock Lexical Profile
CEFR
B2
Grade
6
Tier
2
Usage
Top 10k
Syllables
3
cinderblock Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
North American A hollow rectangular building block made from concrete and coal cinders, widely used in masonry construction.
Example
"The builders stacked the heavy gray cinderblocks to form the foundation wall of the garage."
Synonyms
View all synonyms for cinderblock• Nearby Words
Cite this Entry
Wordmom. (2026). Definition of Cinderblock. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/cinderblock