Noun
line ahead (usually uncountable, plural lines ahead)
(nautical, military) A type of warship formation with the ships proceeding one after another and the trailing ships following behind the lead ship on the same path.
Photo: Trinidad and Tobago’s Michelle-Lee Ahye (right) crosses the finish line ahead of Jamaican sprinter Christiana Williams to take the 100m Commonwealth Games title in Gold Coast on 9 April 2018. Source: Internet
Kevin Sheets, a resident who was helping build a fire line ahead of the blaze, said the fire had already claimed structures by about 7:30 p.m. Source: Internet