sill

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sill /ˈsɪl/ noun
plural sills
sill
/ˈsɪl/
noun
plural sills
Learner's definition of SILL
[count]
: the shelf at the bottom of a window frame : windowsill see picture at window
: a piece of wood, metal, or stone at the bottom of a doorframe
: the part of the frame of a car that is directly under its doors
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