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

Roseville Community Schools reported last week that multiple shell casings were found at Green Elementary School and Roseville High School. —Dejanay Booth-Singleton, CBS News, 25 Nov. 2025

The gun had one shell casing in its chamber and six rounds in its magazine. —Boston Herald Staff, Boston Herald, 23 Nov. 2025

Officers arrived at the shooting scene and found several shell casings in the road, the Yuba City Police Department announced Thursday in a news release. —Rosalio Ahumada, Sacbee.com, 20 Nov. 2025

Willows, egrets and frogs populate soft-bottom sections where springs and a high water table would reject a concrete casing. —Emma Bowman, NPR, 17 Nov. 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