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Definition of Tongue and groove
1. Noun. A joint, in flooring or panelling, made by fitting a ridge (''tongue'') along the edge of one board into a corresponding slot (''groove'') on another. ¹
¹ Source: wiktionary.com
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1. Noun. A joint, in flooring or panelling, made by fitting a ridge (''tongue'') along the edge of one board into a corresponding slot (''groove'') on another. ¹
¹ Source: wiktionary.com