1. protective outer coverings or containers, especially cylindrical ones
2. the cleaned intestines of animals used to enclose sausages
Usage: culinary
3. metal or plastic tubes that line the walls of oil or water wells
Usage: technical

Examples

• The sausages were stuffed into natural casings.
• The workers installed steel casings in the oil well.
• The electrical wires were protected by plastic casings.
• She removed the casings from the frankfurters before cooking.
• The well casings prevented contamination of the groundwater.
• Metal casings protected the sensitive equipment from damage.