An agreement is a harmony of opinion, action, or character — and, by extension, an arrangement between parties about a course of action, including one that binds them as a contract.
The word arrived around 1400 from Old French agrement, "mutual understanding," built on agreer, "to please, satisfy," which traces to Latin gratus, "pleasing, welcome." Its root sense is not obligation but mutual pleasure: to agree was first to find something agreeable. That origin still shows in the word's range, which runs from a shared view between two people to a formal instrument with terms and signatures.
English uses agreement in three main ways. The first is concord — two people in agreement share an opinion or aim. The second is the arrangement itself, spoken or written, that sets out what each party will do; when it is legally enforceable, it becomes a contract. The third is grammatical: subject and verb agree in number and person. Agreement differs from 📝consensus, which names the general agreement of a group rather than a settlement between parties, and from consent, which is one party's permission rather than a meeting of minds. A contract is always an agreement; an agreement need not be a contract.
Agreements are how we govern 📝One Inc: the 📝One Agreement lets value convert between 📝types of capital before anyone knows its worth, and the 📝Agreements of One hold our shared principles as a 📝living system meant to evolve.