The phrase "aimed at defeating" is correct and usable in written English.
It can be used when describing a goal or intention to overcome or eliminate something, often in a competitive or adversarial context.
Example: "The new policy is aimed at defeating the rising trend of cyberbullying in schools."
Alternatives: "intended to overcome" or "designed to combat".
The rebels see the program as a strategy aimed at defeating them.
In the early spring of 1999 the Serbs launched a major offensive aimed at defeating the insurgents.
Government policy during the 1980s was little more than a war policy, aimed at defeating or isolating republicanism.
But it was public opinion that concerned the president, and Lincoln hammered home the point that this revolution in federal policy was aimed at defeating the rebellion.
The largest union of registered nurses in the country will begin a $200,000 advertising campaign on Monday aimed at defeating Sharron Angle, the Republican challenger to Senator Harry Reid of Nevada, the majority leader.
But they have also used the prisons to dissuade Afghans like Attiqullah from helping NATO forces and the government win over the population by offering them services, a critical part of the counterinsurgency strategy aimed at defeating the Taliban.
"We aim at defeating the mind-set that was behind her assassination.
Some $500 million approved by U.S. lawmakers to train and arm Syrian rebels is aimed not at defeating Assad but at battling Islamic State.
Beijing's recent military threats toward Taiwan were aimed primarily at defeating Mr. Chen, who first entered politics as an advocate of Taiwanese independence.
That would prohibit any tax-exempt activity aimed at electing or defeating specific political candidates.
This would include express electoral activity -- that is, efforts aimed at supporting or defeating specific candidates.
