at will - Legal Definition
Webster's New World Law Dictionary Copyright © 2010 by Wiley Publishing, Inc., Hoboken, New Jersey.
A status or relationship that can be terminated for any reason, or for no reason, at any time without prior notice.
Used by arrangement with John Wiley & Sons, Inc.
at will - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Freely, as one pleases, as in The grounds are open to the public and one can wander about at will, or With this thermostat you can adjust the room temperature at will. [1300s]