O7 may refer to: O7 star, a subclass of O-type stars LNER Class O7, a class of British steam locomotives O7, the IATA airline designator for OzJet o7, an emoticon for a person saluting O-7, a pay grade in the US uniformed services: Brigadier General in the Army, Marine Corps, Air Force, and Space Force Rear admiral (lower half) in the Navy, Coast Guard, Public Health Service Commissioned Corps, and NOAA Commissioned Officer Corps See also 07 (disambiguation) 7O (disambiguation) o07 (disambiguation)