Definition of sill noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//sɪl//
    ; NAmE NAmE//sɪl//
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  1. 1= windowsill
  2. 2a piece of metal that forms part of the frame of a vehicle below the doors
  3. Word OriginOld English syll, sylle ‘horizontal beam forming a foundation’, of Germanic origin; related to German Schwelle ‘threshold’.
See the Oxford Advanced American Dictionary entry: sill

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