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

Plus, its water-resistant casing is perfect for poolside parties or light rain. —Bestreviews, Chicago Tribune, 30 Apr. 2026

Investigators found two shell casings matching those found at the crime scene in the car’s cupholder. —Caroline Zimmerman, Kansas City Star, 29 Apr. 2026

Authorities later recovered approximately 20 spent shell casings from the room, along with a rifle believed to have been used in the shooting. —Mankato Free Press, Twin Cities, 29 Apr. 2026

Authorities have charged a 22-year-old named Tyler Robinson, who allegedly engraved messages into shell casings. —Michael Ruiz, FOXNews.com, 28 Apr. 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