1. To help someone in accomplishing a task or job: Chuck had to prepare a speech for the next meeting, and so he asked his friend Stella to assist him in refining it and then having her listen to him speaking!
2. To give a person some advice, money, or information: The police asked the public to assist them in finding the culprit!
3. To facilitate a job or work by having something to help out: When Mr. Madison decided to make his will, he received some information from his insurance agency to assist him in understanding and accomplishing his undertaking.