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

Police records indicate Harris was shot three times, though investigators found only one spent bullet casing in the building’s side walkway. —Sam Charles, Chicago Tribune, 30 Jan. 2026

More than 100 shell casings were found near the scene, according to Comeaux. —Timia Cobb breaking News Reporter, Dallas Morning News, 29 Jan. 2026

Detectives connected Roath to the shooting through the use of city cameras, license plate readers, phone records, and ballistic evidence — including a 9mm shell casing found outside Kourtney’s home that traced back to a gun found under Roath’s mattress in his bedroom, according to court documents. —Kansas City Star, 27 Jan. 2026

Three matching shell casings were found within the wrapping of Jennie's body, and one was later found lodged between the baseboard and box spring of Emily's bed. —Natalie Morales, CBS News, 27 Jan. 2026

Word History

First Known Use

1791, in the meaning defined at sense 1

Rhymes for casing

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

Kids Definition

casing

noun

cas·​ing ˈkā-siŋ 

1

: something that encloses or surrounds

2

: a frame around a door or window opening