Definition as Noun

• the outermost covering of a pneumatic tire
• the enclosing frame around a door or window opening
• the housing or outer covering of something

Definition as Noun

• a protective covering (as for a knife or sword)
• an enveloping structure or covering enclosing an animal or plant organ or part
• a dress suitable for formal occasions

• case

• shell, case

• case

• cocktail dress

• "the casings had rotted away and had to be replaced"

• "the clock has a walnut case"

• Casing vs case
• Casing vs shell
• Casing vs cocktail dress

• Sheath vs case
• Sheath vs shell
• Sheath vs cocktail dress