Source : Free On-Line Dictionary of Computing

cooked mode
     
        The normal{Unix} character-input mode, with interrupts enabled
        and with erase, kill and other special-character
        interpretations performed directly by the tty driver.
        Opposite of {raw mode}.  See also {rare mode}.  Other
        operating systems often have similar mode distinctions, and
        the raw/rare/cooked way of describing them has spread widely
        along with the {C} language and other Unix exports.  Most
        generally, "cooked mode" may refer to any mode of a system
        that does extensive preprocessing before presenting data to a
        program.
     
        [{Jargon File}]