Learner's definition of CONVICTION
1 law : the act of proving that a person is guilty of a crime in a court of law
In light of the evidence, a conviction seems certain.
He has three prior/previous drunk-driving convictions.
Convictions for shoplifting have made it difficult for her to get a job.
2 a [count] : a strong belief or opinion b [noncount] : the feeling of being sure that what you believe or say is true