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

During the search, BPD said officers found a ghost gun that contained one spent shell casing lodged in the chamber and was loaded with 16 live rounds in a large-capacity magazine. — Colleen Cronin, Boston Herald, 16 July 2026

Officers found a 9 mm shell casing and a bullet fragment from the parking lot. — Kansas City Star, 15 July 2026

Responding officers located multiple shell casings but not any suspects or victims. — Caelyn Pender, Mercury News, 15 July 2026

He is accused of writing anti-insurance industry messages on casings recovered from the crime scene. — Michael Ruiz , Tessa Hoyos, FOXNews.com, 13 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