Meaning of THICKNESS in English

THICKNESS

/ ˈθɪknəs; NAmE / noun

1.

[ U , C ] the size of sth between opposite surfaces or sides

SYN width :

Use wood of at least 12 mm thickness.

The board is available in four thicknesses.

2.

[ C ] thickness (of sth) a layer of sth :

The jacket was lined with a double thickness (= two layers) of fabric.

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WORD ORIGIN

Old English thicness (see thick , -ness ).

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.