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

Heavy-duty mechanical hinges connect titanium-alloy limbs to a protective casing of carbon fiber, enabling smooth, deliberate strides on brutish red legs. — Charlie Campbell, Time, 23 July 2026

The German defense contractor is one of the world's largest ammunition manufacturers and one of the few manufacturers to cover the entire value chain, from the gunpowder propellant to the bullet casing. — Elsa Ohlen,greg Kennedy, CNBC, 23 July 2026

In a particularly deft move, Ruppert commissioned a custom casing for a Samsung Frame TV—disguised among the works—to echo their frames. — Leonora Epstein, Architectural Digest, 22 July 2026

Chicken sausages, but with the outside casing being too small for the amount of meat on the inside. — Maria Bamford, Vulture, 22 July 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