1 noun expenditurecostais mpl1 c m uthe administrative costs were highbhí na costais riaracháin ardwe'll pay your travel costsdíolfaimidne as do chostais taistil, íocfaimidne as do chostais taistil2 noun LAW legal expensescostais mpl1 c m uhe was ordered to pay costsordaíodh dó na costais a íoc, gearradh na costais air → féach cost