ignition 2022.12.06 ignitionとは 意味・定義・例文 Noun 名詞 1. the act of starting to burn; catching or taking fire 発火, 点火, 着火 an ignition plug 2. the electrical system in an engine that makes it start working 点火装置[スイッチ], イグニション switch on[turn off] the ignition