Hubris, though not specifically defined, was a legal term and was considered a crime in classical Athens. It was also considered the greatest sin of the ancient Greek world. That was so because it not only was proof of excessive pride, but also resulted in violent acts by or to those involved. The category of acts constituting hubris for the ancient Greeks apparently broadened from the original specific reference to mutilation of a corpse, or a humiliation of a defeated foe, or irreverent, “outrageous treatment”, in general.
The meaning was eventually further generalized in its modern English usage to apply to any outrageous act or exhibition of pride or disregard for basic moral laws. Such an act may be referred to as an “act of hubris”, or the person committing the act may be said to be hubristic. Ate, Greek for ‘ruin, folly, delusion’, is the action performed by the hero, usually because of his/her hubris, or great pride, that leads to his/her death or downfall.