一念之间 yīniànzhījiān in a flash of thought Origin Definitions Defs Strokes Stroke Words Sentences Sents 一念 yīniàn a single thought A single thought or an instant; the very moment a thought arises.之间 之間 zhījiān locativenoun during A period of time within two points; also used after certain words to indicate a very short duration or an instant.