Learner's definition of GUILTY
[also more guilty; most guilty]
responsible for committing a crime or doing something bad or wrong
Do you think he's innocent or guilty?
Will the defendant plead guilty or not guilty?
Police have not been able to identify the guilty party. [=the person who committed the crime]
The state will prove that the defendants are guilty as charged. [=that they committed the crime they are accused of committing]
(informal) They're (as) guilty as sin. [=completely/very guilty]
— often + of
— sometimes used informally in a joking way
showing that you know you have done something bad or wrong
feeling bad because you have done something bad or wrong or because you believe you have done something bad or wrong