v. phr. 1. To take places in a line or formation; stand side by side or one behind another; form a line or pattern. The boys lined up and took turns diving off the springboard. The football team lined up in a "T" formation. 2. To put in line. John lined up the pool balls. 3. To adjust correctly. The garage man lined up the car's wheels. 4a. informal To make ready for action; complete a plan or agreement for; arrange. Henry's friends lined up so many votes for him that he won the election. Roger lined up a summer job before school was out. The superintendent lined up all the new teachers he needed before he went on vacation. 4b. informal To become ready for action; come together in preparation or agreement. The football schedule is lining up well; the coach has arranged all games except one. Larry wanted to go to the seashore for the family vacation, but the rest of the family lined up against him.
Compare: GANG UP, SHAPE UP, TAKE SIDES.