Of set purpose; self-determined; voluntary; as, willful murder.

a knowing disregard for the consequences of one's actions

Deliberate, voluntary, and intentional, as distinguished from acts committed through inadvertence, accident, or ordinary negligence.

Governed by the will without yielding to reason; obstinate; perverse; inflexible; stubborn; refractory; as, a willful man or horse.

Any act with is consciously or intentionally performed and directed toward achieving a specific purpose.