Betrothal (noun)

The act of betrothing or the state of being betrothed; engagement to be married.

Origin:

From middle english betrothal, from old english betrōthung ("betrothal"), from betrōwan ("to betroth"), equivalent to be- +‎ troth.

Examples:

1. The betrothal of Prince Harry and Meghan Markle was announced in November 2017.
2. Their parents arranged for the betrothal of the two children when they were still infants.
3. The betrothal period is a time for the couple to get to know each other better.
4. The betrothal ceremony was a traditional one, with exchange of rings and blessings.
5. Betrothal is the first step towards a lifelong commitment.