To decide that someone is not guilty of a crime
1) To pay off debt.
2) To discharge completely from an obligation or an accusation (the court acquitted the prisoner)
3) to conduct (oneself) usually satisfactorily especially under stress (the boy acquitted himself like a soldier)
1) The jury acquitted the defendant because there wasn't enough evidence to convict him of the crime.
2) He was acquitted of the robbery charge after proving that he was nowhere near the scene of the crime.
From Middle English acquiten which means 'free of'.
absolve, exculpate, clear, exonerate, vindicate