| PEI | United States architect (born in China in 1917) |
|---|---|
| PEI | a loose dressing gown for women |
| PEI | capital of the People's Republic of China in the Hebei province in northeastern China |
| PEI | American philosopher and logician |
| PEI | United States mathematician and astronomer remembered for his studies of Uranus and Saturn and Neptune (1809-1880) |
| PEI | genus of tropical American shrubby trees and woody climbers having slender branches with broad flat leaves and large panicles of flowers |