ne‧go‧ti‧a‧tion S2 W2 [countable usually plural, uncountable]
official discussions between the representatives of opposing groups who are trying to reach an agreement, especially in business or politics
The negotiations with the company had reached a crucial stage.
This follows private negotiations between the landowner, and the leisure centre.
He is trying to involve community leaders in negotiations on reform.
open/enter into negotiations (with somebody) (=start official discussions)
The government opened negotiations with the IMF for another loan.
the next round of arms negotiations
The price is generally open to negotiation (=is not fixed and can be discussed).