/vaʊ ||; vaυ/noun [C] a formal and serious promise (especially in a religious ceremony) 誓约，誓言（尤指宗教仪式中的）: to keep/break your marriage vows 履行╱违反结婚誓言 vow verbWe vowed never to discuss the subject again. 我们发誓绝不再谈此事。