JKO Views 8 meanings found JKO can signify Jacqueline Kennedy Onassis, the Japan Karate‑Do Organization, or Joint Knowledge Online, an e‑learning platform for government and corporate training. Miscellaneous Jedi Knight Officer Jedi Knight Outcast Joint Knowledge Online Jacqueline Kennedy Onassis Community Justin Kalk Orchestra Internet Just Kidding Okay? Business J. K. Orthomedic, Ltd. Sports Japan Karate Do Organization