Definition of line

• a formation of people or things one beside another; "the line of soldiers advanced with their bayonets fixed"; "they were arrayed in line of battle"; "the cast stood in line for the curtain call"
• a mark that is long relative to its width; "He drew a line on the chart"
• a formation of people or things one behind another; "the line stretched clear around the corner"; "you must wait in a long line at the checkout counter"