Definitions

1. noun

A gathering or celebration held before a union, especially a wedding, to celebrate the couple or to allow guests to mingle before the ceremony.

“The preunion festivities were lively and fun, giving everyone a chance to get to know each other.”

2. noun

A period of time immediately before a union or a union of two things, especially a merger or an acquisition.

“The company is in a preunion phase with the rival firm, negotiating terms for the potential merger.”