AGN Views 14 meanings found In astronomy AGN is the shorthand for the energetic cores of active galaxies, whereas in medical literature it may describe a specific kidney inflammation, and the letters occasionally serve as a ticker for a pharmaceutical company. Medical Acute GlomeruloNephritis Miscellaneous Argent Global Network Community Actors Guild of Nigeria Academic & Science Active Galactic Nuclei Active Galactic Nucleus Active Galaxy Nucleus Regional Angoon, Alaska USA African Grantmakers Network African Group of Negotiators Computing Psion Series 3 Agenda file AGaiN Business Allergan, Inc. Accountants Global Network Aegon N.V. (de-listed)