[enter] into an agreement

to formally and mutually agree to specific terms, conditions, or commitments in a contract or arrangement with another party

The two companies decided to enter into an agreement for a joint marketing campaign.
The labor union negotiated with the company to enter into an agreement on workers' benefits.
Parties involved in international trade must enter into agreements to facilitate smooth transactions.
The two companies are entering into an agreement to collaborate on a joint research project.
Last year, the countries entered into an agreement to promote trade and strengthen diplomatic ties.