Meaning of Forestall: to prevent, defeat, etc., (a person or their plans) by acting first.
1. We must act now to forestall disaster.
2. The National Guard was sent to forestall any trouble.
3. I left the room to forestall involvements.
4. Try to anticipate what your child will do and forestall problems.
5. Fortunately at the last minute, a mediator was able to talk to the two world leaders and forestall