What is the meaning of Run_up?

Used other than figuratively or idiomatically: see run, up.

To run (towards someone or something); to hasten to a destination.

To approach (an event or point in time).

To take to a destination or before an authority.

To erect hastily, as a building.

To make something, usually an item of clothing, very quickly.

To bring (a flag) to the top of its flag pole.

To string up; to hang.

Of a bowler, to run, or walk up to the bowling crease in order to bowl a ball.

To rise; to swell; to grow; to increase.

To accumulate (a debt).

To thrust up, as anything long and slender.

To warm up and test an airplane before a flight.

To accumulate money, drugs, etc.

Alternative form of run-up

Source: wiktionary.org