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

• 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

The sturdy metal casing and long battery life make this configuration ideal for working on the go, so have a laptop bag handy. —Jade Chung-Lee, PC Magazine, 25 June 2025

Police found ten bullet casings on the scene, and security video showed a white BMW SUV leaving after the shooting. —Bethy Squires, Vulture, 12 June 2025

Vehicles were shot up and police recovered at least 10 casings. —Meredith Colias-Pete, Chicago Tribune, 10 June 2025

The projectile, later removed during surgery, was a flash bang explosive device in a hard plastic casing. —Sarah Jones, People.com, 10 June 2025

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