the act or fact of agreeing [by mutual ]
unity of opinion, understanding, or intent
the mutual assent of contracting parties to the same terms [if they reach ] NOTE: Under common law, agreement is a necessary element of a valid contract. Under Uniform Commercial Code section 1-201(3), agreement is the bargain of the contracting parties as represented explicitly by their language or implicitly by other circumstances (as a course of dealings).
an expression (as a settlement, covenant, or contract) of the intent or willingness of two or more parties to bind at least one to terms usually determined by negotiation [an must be sufficiently definite before a court can enforce it "J. D. Calamari and J. M. Perillo"]
the language or instrument embodying such an expression [signed the ]