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

After testing, the Missouri State Highway Patrol allege the gun matched shell casings collected during their investigation. —Caroline Zimmerman, Kansas City Star, 9 Sep. 2025

This is where a production casing comes into the picture. —Rich Tabaka, Forbes.com, 8 Sep. 2025

In July of last year, after the shooting at the property, the brothers found bullet casings on the floor in front of their apartment. —Jonathan Blitzer, New Yorker, 8 Sep. 2025

Based on the number of shell casings collected at the scene by investigators, including Rangers from the Texas Department of Public Safety, Myers said the gunman fired at least 20 shots before fleeing the bar. —Bill Hutchinson, ABC News, 7 Sep. 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