一念 yīniàn a single thought Definitions Defs Origin Strokes Stroke Words Sentences Sents 一念之间 yīniànzhījiān in a flash of thought in a single moment of thinking; the split second in which a thought or decision occurs一念之差 yīniànzhīchā momentary slip a wrong decision made in a moment of weakness, typically one that leads to serious consequences; a momentary lapse in judgment