Related: agree, bind together, charter, constrict, private law
A contract is an legal agreement such as a license, lease, agreement, treaty.
/*Contract \Con"tract\, n. [L. contractus, fr. contrahere: cf. F.
contrat, formerly also contract.]
1. (Law) The agreement of two or more persons, upon a
sufficient consideration or cause, to do, or to abstain
from doing, some act; an agreement in which a party
undertakes to do, or not to do, a particular thing; a
formal bargain; a compact; an interchange of legal rights.
--Wharton.*/
The GNU General Public Law is a contract between two or more persons.