Comm. [app. f. LAY v.1] One of a certain number of days allowed according to a charter-party for the loading and unloading of cargo.
1845. Stephen, Comm. Laws Eng. (1874), II. 141. That he will load and unload the goods within a certain number of days (usually called lay or running days).
1857. C. Gribble, in Merc. Marine Mag. (1858), V. 5. Should you meet with any detention, it is the fault of your consignees, who do not trouble themselves until your lay days are expired.