What is the meaning of the word "adjust"?

Definitions:

to adapt or conform oneself to new or different conditions verb
- We must adjust to the bad economic situation.
to alter or regulate so as to achieve accuracy or conform to a standard verb
- We adjusted to fit in.
to decide how much is to be paid on an insurance claim verb
- The agent adjusts eight hours per day.
to make correspondent or conformable verb
- I need to adjust the seat.
to place in a line or arrange so as to be parallel or straight verb
- I adjusted my pens so that my desk appeared orderly.