noun
traditional Japanese engagement ceremony
A formal ceremony where the families of the bride and groom exchange betrothal gifts (結納品). Often shortened to 結納.
See also: 結納
結納式は両家の親族が集まって行われた。
The engagement ceremony was held with relatives from both families gathered.
結納式の後、正式に婚約が成立した。
After the engagement ceremony, the betrothal was officially established.
婚約式 is a more general term for an engagement ceremony, not necessarily following the traditional Japanese 結納 customs.
Compound of 結納 (ゆいのう, 'betrothal gifts') and 式 (しき, 'ceremony'). 結納 itself derives from 結い (ゆい, 'tying, binding') and 納 (のう, 'offering, presenting').