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Here are all the possible meanings and translations of the word RO. Princeton's WordNet(0.00 / 0 votes)Rate this definition: Ro(noun) an artificial language for international use that rejects all existing words and is based instead on an abstract analysis of ideas.
Also found in: Dictionary, Acronyms, Encyclopedia, Wikipedia. review of systems (ROS) (in a health history) a system-by-system review of the body functions. The ROS is begun during the initial interview with the patient and completed during the physical examination, as physical findings prompt further questions. Questions about family or personal history are included in each section.