2 definitions found From WordNet (r) 2.0 [wn]: ONI noun: the military intelligence agency that provides for the intelligence and counterintelligence and investigative and security requirements of the United States Navy [syn: {Office of Naval Intelligence}] From Virtual Entity of Relevant Acronyms (Version 1.9, June 2002) [vera]: ONI Operator Number Identification

Definitions retrieved from local copies of the freely distributed DICT client/server software and databases. Click here for database copyright information.