1. In an ominous manner
   "the sun darkened ominously"

See also: ominous

Encyclopedia: Ominously

• Organization of Petroleum-Exporting Countries
• Organization of the Oppressed on Earth
• organizational
• organizational chart
• organizationally
• organize
• organized
• organized crime
• organized labor
• organized labour
• organized religion
• organizer
• organo-
• organogenesis
• organogram
• organoleptic
• organon
• organophosphate
• organophosphate nerve agent
• organs
• organum
• organza
• organzine
• orgasm
• orgasmic