casing

noun

cas·​ing ˈkā-siŋ 

1

: something that encases : material for encasing: such as

a

: an enclosing frame especially around a door or window opening

b

: a metal pipe used to case a well

c

: tire entry 2 sense 1

d

: a membranous case for processed meat

2

: a space formed between two parallel lines of stitching through at least two layers of cloth into which something (such as a rod or string) may be inserted

Synonyms of casing

• sheath
• housing
• covering
• shell
• case

Examples of casing in a Sentence

a casing for a shotgun shell

the egg of this bird has an unusually hard casing

Recent Examples on the Web

Investigators found 27 spent shell casings at the scene. —Tom Ignudo, CBS News, 19 May 2026

Investigators recovered shell casings from the scene and obtained surveillance footage showing a black sedan involved in the shooting. —Mateo Rosiles, USA Today, 18 May 2026

Also, at the new stations the pathway between the train tracks and the escalator casings is significantly narrower than at the older stations. —Los Angeles Times, 18 May 2026

Cracks in the casing, a stiff or fraying cord, or discoloration around outlets mean that your power strip is failing. —Louise Parks, Martha Stewart, 16 May 2026

Word History

First Known Use

1791, in the meaning defined at sense 1

Rhymes for casing

• basing
• bracing
• chasing
• facing
• gracing
• lacing
• lasing
• pacing
• placing
• racing
• spacing
• tracing

Kids Definition

casing

noun

cas·​ing ˈkā-siŋ 

1

: something that encloses or surrounds

2

: a frame around a door or window opening