To align means to bring something into a straight line, or an easy agreement. If you always park on an angle and people are leaving mean notes on your windshield, learn to align the car with the parking space.
Align comes from the French a, meaning "to" and ligne meaning "line," and it means to bring something into line with something else. This can be literal. If you are hanging a painting, you'll want to align it with the window frame. The line can also be metaphorical. If you run for office, your political opinions will need to be aligned with those of your supporters.