Source : Webster's Revised Unabridged Dictionary (1913)

Line-up \Line"-up`\, Lineup \Line"up`\, n.
   The formation of football players before the start or a
   restart of play; hence (Colloq.), any arrangement of persons
   (rarely, of things), esp. when having a common purpose or
   sentiment; as, the line-up at a ticket-office window; the
   line-up of political factions.