casing

American  

[key-sing] / ˈkeɪ sɪŋ /

noun

1. a case or covering; housing.

2. material for a case or covering.

3. the framework around a door or window.

4. the outermost covering of an automobile tire.

5. any frame or framework.

6. a steel pipe or tubing, especially as used in oil and gas wells.

7. a layer of glass that has been fused to an underlying layer of glass of a different color or of different properties.

8. the thin, tubular membrane of the intestines of sheep, cattle, or hogs, or a synthetic facsimile, for encasing processed meat in making sausages, salamis, etc.

9. Nautical. the walls surrounding a funnel.

10. a channel created in a garment or other article to carry a drawstring or elastic, as by sewing a strip of cloth to the basic material with two parallel rows of stitches.

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casing British  

/ ˈkeɪsɪŋ /

noun

1. a protective case or cover

2. material for a case or cover

3. Also called: case.  a frame containing a door, window, or staircase

4. the intestines of cattle, pigs, etc, or a synthetic substitute, used as a container for sausage meat

5. the outer cover of a pneumatic tyre

6. a pipe or tube used to line a hole or shaft

7. the outer shell of a steam or gas turbine

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Other Word Forms

• undercasing noun

Etymology

Origin of casing

First recorded in 1565–75; case ² + -ing ¹

Example Sentences

Cartridge casings recovered near the Utah crime scene were matched through a federal database to an expended casing previously found during a search of Buzzard’s home in Vandenberg Village.

From Los Angeles Times • Dec. 26, 2025

The glitchy Permian plumbing is forcing producers to drill through zones of high pressure, fortify their wells with additional strings of casing, and use protective coating against corrosive saltwater.

From The Wall Street Journal • Dec. 26, 2025

The process works by placing a brass casing inside an electrochemical cell filled with a chemical solution.

From Science Daily • Nov. 2, 2025

But a metal casing on well SS-25 had corroded, and gas began blowing out at very high volumes.

From Los Angeles Times • Oct. 23, 2025

They streak past me into the hall in a blast of gossamer, and she slams the book she was swinging at them into the door casing.

From "The Cruel Prince" by Holly Black

Related Words

• skin
• wrapper