Attitudes are valenced feelings towards salient objects. Attitudes are said to be composed of expectations, beliefs, and emotional responses to a psychological entity which operate at or below the level of awareness to influence attitude-related behaviour (Bagozzi, 1982).
Prejudice is a much discussed example of attitudes.
Bagozzi, R. P. (1982). A field investigation of causal relations among cognitions, affect, intentions, and behaviour. Journal of Marketing Research, 19, 562-584.