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

Some tea strainers feature a mesh casing, which is the best option for preventing small particles from escaping the infuser and winding up in your drink. — Bestreviews, Chicago Tribune, 9 July 2026

Investigators recovered spent pistol casings at the scene, the SBU said. — Los Angeles Times, 7 July 2026

Her body was found with gunshot wounds to the head and pistol casings, according to police and the Ukrainian Prosecutor’s Office. — Daria Tarasova-Markina, CNN Money, 7 July 2026

Investigators connected the four crimes by analyzing matching bullet casings, phone records, and surveillance footage showing a black Chevy Tahoe. — Nicole Acosta, PEOPLE, 7 July 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