cill

Multiple Entries:
  cill    sill  

Concise Oxford English Dictionary © 2008 Oxford University Press:
cill

▶noun chiefly Building variant spelling of sill.

Concise Oxford English Dictionary © 2008 Oxford University Press:
sill /sɪl/ (also chiefly Building cill)

▶noun

• 1 a shelf or slab of stone, wood, or metal at the foot of a window or doorway.

  ■ a strong horizontal member at the base of any structure, e.g. in the frame of a motor or rail vehicle.

• 2 Geology a tabular sheet of igneous rock intruded between and parallel with the existing strata. Compare with dyke1.

• 3 an underwater ridge or rock ledge extending across the bed of a body of water.

– origin OE syll, sylle ‘horizontal beam forming a foundation’, of Gmc origin.