noun

1. An understanding between entities to follow a specific course of conduct.

   “to enter an agreement;  the UK and US negotiators nearing agreement;  he nodded his agreement.”

2. A state whereby several parties share a view or opinion; the state of not contradicting one another.

   “The results of my experiment are in agreement with those of Michelson and with the law of General Relativity.”

3. A legally binding contract enforceable in a court of law.

Synonyms: settlement, accord, concurrence, congeniality, harmony, amenity, niceness, pleasantness