Laissez Faire attitude is basically built on the terms of non-interference. It is often used to refer to a system of government which upholds autonomous character of economic order. It believes that the government should intervene as little as possible in the affairs of the economy.
On the other hand, in normal social terms, it is the practice of non-interference in the affairs of other people. So everyone has a freedom of action.
The term "laissez faire" comes from a French Phrase that goes; "laissez faire, laissez aller, laissez passer" meaning "let do, let go, let pass". The word "Laissez" is from the French and means "to allow" or "to let" and the word "faire" is French "to do".
Even though the term simply means to permit someone to do something it has a deeper meaning. It is the basis or encompasses an economic theory that suggests complete government non-interference in trade, commerce and the market. It advocates that the forces of the economy should be left alone to behave as per their own economic laws. In another usage of the term it refers to the non-interference in other's affairs.
The concept of the term can be defined as non interventionist and its opposite would be interventionist.