Freethought (sometimes spelled free thought) is an unorthodox attitude or belief.
A freethinker holds beliefs that should not be formed on the basis of authority, tradition, revelation, or dogma, and should instead be reached by other methods such as logic, reason, and empirical observation. According to the Collins English Dictionary, a freethinker is "One who is mentally free from the conventional bonds of tradition or dogma, and thinks independently." In some contemporary thought in particular, free thought is strongly tied with rejection of traditional social or religious belief systems. The cognitive application of free thought is known as "freethinking", and practitioners of free thought are known as "freethinkers". Modern freethinkers consider free thought to be a natural freedom from all negative and illusive thoughts acquired from society.