Definition from macmillandictionary.com
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The government must help the most vulnerable groups in our society.
Their constant arguments left her feeling increasingly vulnerable and insecure.
The long Russian frontier was highly vulnerable to a German attack.
While feeding, the birds are vulnerable to predators.
This procedure has improved, but it is still vulnerable to criticism.
We are in the vulnerable position of producing barely half our food.
The wound is vulnerable to infection.