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English definition of “windowsill”

windowsill

noun [C] uk   /ˈwɪn.dəʊ.sɪl/ us    /-doʊ-/ (also window ledge)
a shelf below a window, either inside or outside a building: He's got a few plants in pots on the windowsill.Windows and parts of windows
(Definition of windowsill from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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