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

• 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

Responding officers found a single bullet casing on the sidewalk at the scene of murder. —Thomas Tracy, New York Daily News, 20 Aug. 2025

Officers found Becker dead, and recovered seven 9 mm cartridge casings in the alley near his body. —Nick Ferraro, Twin Cities, 19 Aug. 2025

However, there's another electric motor, this one a permanent synchronous motor built into the eight-speed dual-clutch (PDK) transmission casing. —Jonathan M. Gitlin, ArsTechnica, 15 Aug. 2025

Forensic testing matched the .40 and 5.7mm caliber shell casings to another shooting on July 16, a case in which Lopez-Hernandez and Chavarria are suspects. —Pj Green, Kansas City Star, 14 Aug. 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