Definition from macmillandictionary.com
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She was wearing a thick woollen sweater.
a thick layer of snow
Cut the bread into thick slices.
Try not to make too much noise – the walls aren’t very thick.
The walls in our house are only a few inches thick.
It is a rectangular piece of wood, perhaps 5 centimetres thick.
For dessert, serve strawberries covered in thick sweet cream.
The soup should be nice and thick.
Her thick dark hair hangs all the way to her shoulders.
a thick beard
a thick row of trees
Thick fog prevented Bobby from returning home.
The air was thick with smoke.
The airport was thick with police officers.
He speaks Spanish fluently, but with a thick British accent.
His voice was thick with fury.
He’s rich, but a bit thick.
She’s very thick with her next-door neighbour.