Definition of underlay noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈʌndəleɪ//
; NAmE NAmE//ˈʌndərleɪ//
[uncountable, countable]
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a layer of thick material placed under a carpet to protect it Word Origin Old English underlecgan (from under- and the verb lay).
See the Oxford Advanced American Dictionary entry: underlay

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