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 canvassed the area and found spent shell casings at the scene. —Adam Harrington, CBS News, 16 June 2026

The situation gets even worse once Bonnie’s concerned parents try to connect their daughter with friends by buying her a Lilypad, a child-appropriate smart tablet in frog-like casing, voiced with slappably perky self-satisfaction by Greta Lee. —David Rooney, HollywoodReporter, 16 June 2026

Joan Cusack and Tim Allen also signed the plastic casing, and posed with the singer for photos. —Leigh Blickley, Entertainment Weekly, 12 June 2026

But prosecutors say that police collected 37 shell casings from the scene, not 30. —Nate Gartrell, Mercury News, 11 June 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