Agreement is meeting of:

In contract law, an agreement is fundamentally defined as a 'meeting of minds' or 'consensus ad idem' - where both parties understand and agree to the same terms in the same sense. The Indian Contract Act, 1872 requires that parties must be 'ad idem' (of the same mind) regarding the subject matter. While physical documents memorialize agreements and hands may execute them, the essence is the mutual understanding and assent.