Criticism
Criticism is the practice of judging the merits and faults of something.
The judger is called a critic.
To engage in criticism is to criticise (in British English) or criticize (in American English). (See American and British English spelling differences.)
One specific item of criticism is called a criticism or critique.
Criticism as an evaluative or corrective exercise can occur in any area of human life. Criticism can therefore take many different forms (see below). How exactly people go about criticizing, can vary a great deal. In specific areas of human endeavour, the form of criticism can be highly specialized and technical; it often requires professional knowledge to understand the criticism. This article provides only general information about criticism. For subject-specific information, see the Varieties of criticism page.
To criticize does not necessarily imply "to find fault", but the word is often taken to mean the simple expression of an objection against prejudice, or a disapproval of something. Often criticism involves active disagreement, but it may only mean "taking sides". It could just be an exploration of the different sides of an issue. Fighting is not necessarily involved.