isis Meaning, Definition & Usage

  1. noun Egyptian goddess of fertility; daughter of Geb; sister and wife of Osiris
  2. noun the Pakistan intelligence agency; a powerful and almost autonomous political and military force; has procured nuclear technology and delivery capabilities; has had strong ties with the Taliban and other militant Islamic groups
    Directorate for Inter-Services Intelligence; ISI; Inter-Services Intelligence.

WordNet

I"sis noun
Etymology
L., the goddess Isis, fr. Gr. .
Definitions
  1. (Myth.) The principal goddess worshiped by the Egyptians. She was regarded as the mother of Horus, and the sister and wife of Osiris. The Egyptians adored her as the goddess of fecundity, and as the great benefactress of their country, who instructed their ancestors in the art of agriculture.
  2. (Zoöl.) Any coral of the genus Isis, or family Isidæ, composed of joints of white, stony coral, alternating with flexible, horny joints. See Gorgoniacea.
  3. (Astron.) One of the asteroids.

Webster 1913