A contract is an agreement end of discussion
con·tract
noun
'kän?trakt/
1.
a written or spoken agreement, esp. one concerning employment, sales, or tenancy, that is intended to be enforceable by law.
synonyms: agreement, commitment, arrangement, settlement, understanding, compact, covenant, bond; More
the branch of law concerned with the making and observation of contracts.
informal
an arrangement for someone to be killed by a hired assassin.
"smuggling bosses routinely put out contracts on witnesses"
BRIDGE
the declarer's undertaking to win the number of tricks bid with a stated suit as trump.
"South can make the contract with correct play"
dated
a formal agreement to marry.
verb