noun

a written or spoken agreement, especially one concerning employment, sales, or tenancy, that is intended to be enforceable by law.

he has just signed a contract keeping him with the club

agreement,commitment,arrangement,settlement,undertaking,understanding,compact,covenant,pact,bond,deal,bargain,treaty,concordat,convention,entente,account,indenture,engagement

verb

decrease in size, number, or range.

glass contracts as it cools

shrink,get smaller,become smaller,decrease,diminish,reduce,dwindle,decline,shrivel