1 culpable of or responsible for a wrong.
2 conscious of or affected by guilt (a guilty conscience; a guilty look).
3 concerning guilt (a guilty secret).
4 a (often foll. by of) having committed a (specified) offence. b Law adjudged to have committed a specified offence, esp. by a verdict in a trial.
Derivatives:
guiltily adv. guiltiness n.
Etymology: OE gyltig (as GUILT, -Y(1))
Useful english dictionary. 2012.