The ability or discretion to choose; free choice: chose to remain behind of my own free will.
The power of making free choices that are unconstrained by external circumstances or by an agency such as fate or divine will.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.