PLATONIC Meaning of PLATONIC in English pla ‧ ton ‧ ic /pləˈtɒnɪk $ -ˈtɑː-/ BrE AmE adjective a relationship that is platonic is just friendly and is not a sexual relationship:a platonic friendship Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012