Find a good meaning of stupidity :)

Stupidity could be broadly defined as being ignorant, refusing to learn from past experiences on account of ego and in an informal sense as not being alert both physically as well as mentally. Stupidity is a highly relative term as what one may perceive as stupid may be highly appropriate and wise with respect to the other person. It is only when a person becomes complacent and smug that one becomes susceptible to being stupid.

Another definition of stupidity is believing everything without trying to confirm or analyse the situation and letting one's thoughts and decisions influenced by irrational fears like for example having a superstitious dread of certain things. Stupidity in some cultures is defined as not being well mannered and mindful of propriety and decorum while the same behaviour in other cultures may seem to be arrogant and egoistic and consequently stupid