sash window
US /ˈsæʃ ˌwɪn.doʊ/
UK /ˈsæʃ ˌwɪn.doʊ/
1.
a window consisting of one or more sashes that are movable in grooves, typically sliding up and down or side to side
:
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The old house had beautiful wooden sash windows.
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We need to repair the broken cord on the sash window.