Definition of "tongue-and-groove" []

• Employing tongue and groove joints (adjective)

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• "Stacks of prefinished tongue-and-groove flooring were just outside the door, topped with bundles of the gray radiant heat padding."
• "These days it comes with tongue-and-groove bits built in and substrate layers that allow you to put wood on concrete with the said properly selected substrates between."
• "I'm talking about traditional tongue-and-groove hardwood that's 3/4-inch thick, not engineered hardwood flooring."