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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.
Reverse Osmosis, most commonly known as an RO system, is a water purification technology that passes the water through a semipermeable membrane to remove the polluting particles. Unlike other water filtering systems, RO is able to remove smaller particles, either dissolved or suspended floating in the water, so the filtered waterâs quality will be better.