noun

cinderblock

cinder block, concrete block

They built a wall with cinderblocks.

They built a wall with cinder blocks.

He used a cinderblock to hold the door open.

He used a cinder block to hold the door open.

((sth.)) a building block The garden wall is made of cinderblocks.

Synonyms: concrete block, CMU (Concrete Masonry Unit)

From 'cinder' (ash) + 'block'. A building block made with coal cinders.

Imagine a simple, rough, grey block used for basic construction, like a garage wall.

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