reciprocalvow
nounUK /rɪˈsɪprəkəl vaʊ/
US /rɪˈsɪprəkəl vaʊ/
A promise that two people make to each other at the same time.
At their wedding, the couple exchanged a reciprocal vow to always be kind to each other.
OTHER MEANINGS
2. A formal agreement in which both sides promise to do the same thing for each other.
The two companies signed a reciprocal vow to share their research equally.
3. A pledge made in return for a promise someone else has already made.
She made a reciprocal vow to help him move after he helped her paint her room.
4. A mutual commitment between friends to support each other.
The best friends made a reciprocal vow to always tell each other the truth.