A helpful action or an act of giving.

"The foundation gave a much needed assist to the shelter."

The act of helping another player score points or goals

"He had two assists in the game."

To help.

"This book will assist you in getting your life in order."

To make a pass that leads directly towards scoring.

To help compensate for what is missing with the help of a medical technique or therapy.

To stand (at a place) or to (an opinion).

"A great part of the nobility assisted to his opinion."

To be present (at an event, occasion etc.).