What is the meaning of Line_up?

To align; to put in alignment; to put in correct adjustment for smooth running.

To put things in a line.

To get into a line; especially, so as to wait one's turn.

To start a game in a certain position on the playing field.

To make arrangements for an event.

To support a group or movement.

To agree or correspond.

To have switches set so the train is capable of moving along its correct route.

Nonstandard spelling of lineup.

A haircut where the front region of a person's hair is shaved to form a crisp line between their hair and the shaved region, sometimes coordinated to create a smooth transition between their hair and beard.

Source: wiktionary.org