IPOalso: アイピーオーFreq.FrequencyTop 50,000Meanings1nouninitial public offering; IPOFinancial term for a company's first sale of stock to the public. Often used in business news.See also: 新規株式公開そのスタートアップは来らい月げつIPOを予よ定ていしている。The startup plans to go public next month.2nounInterdecadal Pacific Oscillation; IPOClimate science term for a long-term Pacific Ocean temperature fluctuation. Rare outside technical contexts.IPOは太たい平へい洋ようの十じゅう年ねん規き模ぼの気き候こう変へん動どうパターンだ。