1.
Your volition is the power you have to decide something for yourself. (FORMAL)
We like to think that everything we do and everything we think is a product of our volition...
= free will
N-UNCOUNT
2.
If you do something of your own volition, you do it because you have decided for yourself that you will do it and not because someone else has told you to do it. (FORMAL)
Makin said Mr Coombes had gone to the police of his own volition.
= voluntarily
PHRASE: PHR after v