de•mur•rage [dih-mur-ij] 

Definition – A charge for the amount of days that an import container is under the control of the shipping line after the free time for pickup has expired. Charges are applied for storage of containers while in the steamship lines terminal, rail terminal, inland depot, or container yard.

Origin – From Old French demorage

Related Terms – Detention; Dispatch

Further Reading – Demurrage: FAQ’s and How to Avoid it