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English definition of “grout”

grout

verb [T] uk   /ɡraʊt/ us  
to put a thin line of mortar in the spaces between tiles: We spent the weekend grouting the bathroom.Interior decoration

grout

noun [U] uk   /ɡraʊt/ (also grouting) us  
mortar used for groutingInterior decoration
(Definition of grout from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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