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

Investigators executed a search warrant for the man's vehicle and found an assault-style rifle in the front seat along with multiple shell casings, the complaint said. —Nick Lentz, CBS News, 9 Dec. 2025

Investigators recovered 15 shell casings from the parking lot, and Kasper was hospitalized in serious condition but is expected to survive, the police said. —Bonny Chu, FOXNews.com, 8 Dec. 2025

Investigators found a 9mm bullet casing in the back of Baysinger’s hoodie. —Perry Vandell, AZCentral.com, 8 Dec. 2025

Developers say nearly every component, from weatherproof casing to motion controls and the multilingual voice system, was built specifically for the robot’s role on the streets. —Jijo Malayil, Interesting Engineering, 6 Dec. 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