The full Oxford English Dictionary includes "cill" only as a historical variant spelling in the entry for "sill". Specifically, the entry's variant forms section includes "18 cill", meaning that they're only aware of it being used in the 1800s (as distinct from "18- cill", meaning 1800s to present).

For instance, the level of cill is to a large extent the best technical guess that can be made.

The meaning of CILL is variant spelling of sill.

As nouns the difference between sill and cill is that sill is (also window sill) A horizontal slat which forms the base of a window while cill is more usual spelling of sill when used in the context of an underwater horizontal member which forms the base of a lock gate on a canal or river.

CILL definition: a shelf at the bottom of a window | Meaning, pronunciation, translations and examples

Given how confusing it is with just a little word like “cill”, consider for a moment that you can go into most timber merchants and use the words “pine”, “deal”, “redwood”, “softwood” and even just “timber” to mean simultaneously exactly the same and completely different things.

Cill definition: . See examples of CILL used in a sentence.

2024年3月20日 · "Sill" is the correct spelling for the horizontal structural element found at the base of a window or door, whereas "cill" is an incorrect variant. A sill forms the bottom threshold of a window or doorway.

2025年2月7日 · 1 Horizontal timber (usually called a cill-beam, ground-cill, or sole-piece or -plate) at the bottom of a timber-framed wall into which posts and studs are tenoned. A cill-wall is a low wall of brick or stone supporting the cill-beam.

A windowsill (also written window sill or window-sill, and less frequently in British English, cill) is the horizontal structure or surface at the bottom of a window. Window sills serve to structurally support and hold the window in place.