Meaning of “cardboard” in the English Dictionary

"cardboard" in British English

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cardboardnoun [ U ]

uk /ˈkɑːd.bɔːd/ us /ˈkɑːrd.bɔːrd/

cardboardadjective

uk /ˈkɑːd.bɔːd/ us /ˈkɑːrd.bɔːrd/ disapproving

(Definition of “cardboard” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"cardboard" in American English

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cardboardnoun [ U ]

us /ˈkɑrdˌbɔrd, -ˌboʊrd/

very thick, stiff paper, usually pale brown in color, used esp. for making boxes:

She packed the books in a cardboard box.

(Definition of “cardboard” from the Cambridge Academic Content Dictionary © Cambridge University Press)