Definition of the word line up

The expression "line up" originated during the late 19th century in the British armed forces. The idea was to place soldiers in a single file or queue, imposing a sense of order and discipline. This arrangement facilitated the quick and efficient distribution of supplies, drills, and inspections to soldiers. The phrase "line up" entered the broader vocabulary through its military context, being adopted as a suitable term for arranging people or objects in an organized line. By the early 20th century, "to line up" became prevalent in American English as well, reflecting the increasing spread of regimented social and industrial systems. Today, "line up" is commonly used in various contexts, from implying queues at event entrances to expressing a series of items or plans.