1. the process of increasing or maintaining air pressure in an enclosed space, such as an aircraft cabin or spacecraft
Usage: British spelling; American equivalent is 'pressurization'; commonly used in aviation and aerospace contexts
2. the act of applying pressure or force to something
Usage: general or technical use

Examples

• The aircraft's pressurisation system maintains a comfortable cabin altitude during flight.
• Pressurisation of the spacecraft was completed before the astronauts entered the module.
• Modern aircraft rely on automatic pressurisation to protect passengers at high altitudes.
• The pressurisation of the container ensured the contents remained fresh.
• Engineers tested the pressurisation equipment to ensure it met safety standards.