1. psi - Noun
2. Psi - Proper noun
3. psi - Symbol
a unit of pressure
the 23rd letter of the Greek alphabet
Source: WordNet5) Psi and/or magical powers, if real, are nearly useless. Larry Niven
Erwin with his psi can do Calculations quite a few. But one thing has not been seen: Just what does psi really mean? Erich Hückel
Being part of a fraternity has given me the foundation for everything I do in my career from the loyalty to the determination; it laid the foundation for everything Ive been able to enjoy. Im heavily involved with Omega Psi Phi. Terrence J
A sonic stunner was a surer bet than a hypothetical, undependable psi power. It was real, cold and hard in his hand. Larry Niven
As an Ambassador for PSI and a supporter of Nothing But Nets, I have met individuals around the world who are lending their ideas, their voices, and their time to improve their communities and the world at large. And there are millions more that I have not met. Mandy Moore
Consequently, acetylene, if initiated by intense heat or a shockwave, can decompose explosively if the absolute pressure of the gas exceeds about 200 kPa (29 psi). Source: Internet