party is in agreement (with another) when its stated intentions are compatible with the other's position. There is an agreement when all parties are in agreement with each other.

a small unit of information that is sufficient to indicate that both parties have agreed on a common proposal

a written or unwritten accord between Parties which determines Rights or entitlements in relation to Creations for a given Place and Time

The pact or bargain of the parties in fact as found in their language or by implication from other circumstances, including course of dealing or usage of trade or course of performance as provided in the Uniform Commercial Code.

The bargain of the parties in fact, as found in their language or inferred from other circumstances, and from rules, regulations and procedures given the effect of agreement under laws otherwise applicable to a particular transaction. (UETA)