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English definition of “thickness”

thickness

noun uk   /ˈθɪk.nəs/ us  
[U] the quality of being thick: The thickness of the mulch will prevent weeds growing around the shrubs. Just feel the thickness of this carpet!Thick, dense and heavy [C or U] the distance between the opposite sides of something: How do you measure the thickness of paper? Look at the thickness of that tree trunk.Height, width and length [C] a layer of something: Put several thicknesses of newspaper on the table before you start painting.Coverings and layers
(Definition of thickness from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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