Definition of windowsill in English:

windowsill

Line breaks: win¦dow|sill

noun

  • A ledge or sill forming the bottom part of a window.
    More example sentences
    • Well, the caulking would go down here with the window sill, with the frame.
    • Keep a bucket of soapy water and a second sponge to clean the exterior window sill.
    • It is thought he climbed to the window sill and then slipped over the ledge.

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Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space