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

The officers had both men in handcuffs within seconds and recovered two semi-automatic guns along with four shell casings, prosecutors said. —Asal Rezaei, CBS News, 27 Mar. 2026

Most of those issues have been from oil, lubrication, other or casing or shards inside the engines. —Joel Feder, The Drive, 26 Mar. 2026

But, as steel casings corrode and seabed activity increases, engineers are growing increasingly concerned that weapons once assumed inert are becoming sources of long-term contamination. —Christopher McFadden, Interesting Engineering, 25 Mar. 2026

The suspect was found with a wig, the rifle in question and seven shell casings. —Michael Saponara, Billboard, 25 Mar. 2026

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