0 present participle of foil
1 to prevent someone or something from being successful:
They are attempting to avoid an economic crisis by pushing ahead with the armaments race and foiling international disarmament in every way possible.
What are the things that are foiling us?
Thirdly, security requirements are constantly evolving as networking in the community and computing develop further, electronic communications become more widespread and hackers become more adept at foiling security systems.
We must ensure that the legislation on data protection and that on freedom of information interface correctly and do not become a means of foiling one another.
Techniques such as fingerprinting, face recognition and use of the iris allow us to develop a database capable of foiling attempts to duplicate or steal identity.
The ghosts come back to life, foiling the curse, and all ends happily.
Humans' ability to move out of reach with the help of others, thus foiling the attack, is unusual for a great white's prey.
His help in foiling the plot was rewarded.
