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

Detectives were seen outside the building recovering what appeared to be several shell casings. — Christina Fan, CBS News, 20 Aug. 2026

Director Ridley Scott’s sci-fi masterpiece raises still-relevant questions about the nature of synthetic consciousness, wrapped in a stylish noir casing. — David Faris, TheWeek, 19 Aug. 2026

Officers arrived to find multiple shell casings and an unoccupied vehicle that had been struck multiple times by gunfire. — Jason Green, Mercury News, 18 Aug. 2026

Shell casings littered the dark residential street after the shooting. — Danya Gainor, CNN Money, 17 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