a. to be full of or pervaded by something undesirable
The report was riddled with errors.
The system is riddled with fraud and abuse.
Foreign observers have criticized the electoral process as riddled with irregularities.
She said the management team was 'riddled with dishonesty'.
The government is riddled with corruption.
b. to be damaged or impaired by something
He was so riddled with arthritis he couldn't do anything.
By the time they diagnosed what was wrong with her she was riddled with cancer.