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

Forensics showed the casing was linked to one from a 1998 Kentucky cold case -- the discovery suggested that the same gun was used to commit both crimes. —Claire Lempert, ABC News, 27 Feb. 2026

Bridgeport officers reportedly found 17 shell casings at the scene, court records show. —Staff Report, Hartford Courant, 27 Feb. 2026

Investigators were able to connect him to both crimes by his firearm, as the shell casings recovered at the scene of the traffic stop shooting matched the ones recovered at the senior living facility, according to police. —Jt Moodee Lockman, CBS News, 26 Feb. 2026

He was later charged with the Fuller murder after officials matched a shell casing from the trooper shooting to the gun used to kill the elderly man. —Corky Siemaszko, NBC news, 26 Feb. 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