lay-by /ˈleɪ.baɪ/noun 4lay by verb 3forms 5 noun4 •(UK, Philippines) A paved area at the side of a highway designated for drivers to stop in, for emergency parking, or where vehicles can wait, with larger lay-bys possibly having facilities such as food vendors or public telephones. •(UK) A railroad siding; a second, short railroad track just to the side of a railroad track, connected with the main track by a switch and used for unloading, bypassing, etc. •A widened section of a narrow river or canal, formed to one side so as to leave the channel free, for mooring of vessels, where vessels can lay over or allow others to pass. •(Australia, New-Zealand) A method of retail purchase in which the selected goods are set aside and the customer pays for them in instalments, receiving them when fully paid; layaway. lay by verb3 •To put away for future use; save; to build up as savings.He had managed to lay by money for college through his years as a paperboy. •(of a sailing vessel) To remain stationary while heading into the wind; to come to a standstill; heave to; lay to. •(Southern-US) To tend (a crop) for the last time, leaving it to mature without further cultivation. formslaid by · laying by · lays by · lay bys · lay-bys