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.

Source : WordNet®

lineup
     n 1: (baseball) a list of batters in the order in which they will
          bat; "the managers presented their cards to the umpire
          at home plate" [syn: {batting order}, {card}]
     2: a line of persons arranged by police for inspection or
        identification