To put an end to, especially formally and with authority
To remove or invalidate by or as if by running a line through or wiping clean
See syn. study at
They wanted Dad to annul the marriage - even cut off any money for Mom.
An air-damping apparatus is attached in order to annul the natural oscillations of the pendulum.
The prefect can still annul certain decisions of the conseil general..
22, 1790) he felt it to be his duty to annul all his principal reforms, so as to lighten the difficulties of his successor.
All laws enacted by the insular legislature must also be submitted to the Congress of the United States, which reserves the right to annul them.