To establish or apply by authority or force. The government decided to impose new regulations on the industry.
To force (something unwelcome or unfamiliar) to be accepted or put in place. The teacher did not want to impose her personal beliefs on her students.
To take advantage of someone by demanding their attention or commitment. I hope I'm not imposing by staying at your house for the weekend.
In printing, to arrange pages or forms of type on a press sheet so that they will be in the correct order after folding. The compositor imposed the pages before the sheet went to press.