Lei

Lei could mean:

 Lei, the plural form of Leu, the name of two currencies
 Romanian leu
 Moldovan leu
 Lei (Hawaii), a Hawaiian flower necklace
 Lei (surname), a Chinese name
 Lei (Italy), a town in Sardinia
 Lei Fang, a character in the Dead or Alive game series
 Lei Wulong, a character in the Tekken game series
 Lei (magazine), an Italian magazine
 Lei, the Portuguese language word meaning "law"
 L.E.I., an American fashion brand for girls

LEI could mean:
 LEI, the ATA Airport Code for the Spanish city Almería

LEIS might mean:
Low-energy ion scattering