psi
n. uncountable C1 Advanced US //ˈsaɪ// UK //sˈaɪ// psi
n. a unit used to measure how much pressure is in something, like a car tire or a ball.
n. a unit of pressure resulting from a force of one pound-force applied to an area of one square inch.
Check your car tires to see if they have enough PSI.
The manufacturer recommends maintaining a tire pressure of 32 PSI for optimal fuel efficiency and safety.
Industrial boilers are equipped with safety valves designed to release steam automatically if the internal pressure exceeds a specific PSI threshold, preventing catastrophic structural failure.
Usage
Often used as a collective measurement; when used as a countable unit, it typically refers to specific readings.