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

Delicate electronics, fragile calibration tools or volatile medical supplies may require specialized qualification or shock-absorbing casings to withstand these forces. — Euihyeon Choi, Fortune, 5 Aug. 2026

Xavier’s pistol cast 9-mm cartridge casings into a flower bed and around a trailer parked at the curb as the father tried to evade being shot by his son in midafternoon, in the open in front of four landscapers. — Emerson Clarridge, Fort Worth Star-Telegram, 5 Aug. 2026

Investigators located spent shell casings in the bedroom and paperwork belonging to Shirley and Mosley, the probable cause statement said. — Caroline Zimmerman, Kansas City Star, 5 Aug. 2026

There's issues of calibrations and bullets and casings that were found. — Louisa Moller, CBS News, 4 Aug. 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