In common parlance, no; Iron Man is not a cyborg. He is not much more of a cyborg than a person who wears glasses or contact lenses. A cyborg or cybernetic being, as commonly depicted in science fiction, e.g., RoboCop (1987), The Terminator (1984), The Six Million Dollar Man (1973), and Darth Vader from Star Wars (1977), is a (chiefly cybernetic and often inseparable) fusion of living tissue and synthetic components. This interactive synthesis of organic and artificial systems can produce, for an organic lifeform, a wide variety of effects including, but not limited to, enhanced strength, speed, reflexes, endurance, intelligence etc. Iron Man is a "superhero persona", a man who is wearing/operating a suit of powered armor (an "exoskeleton") that could be worn by different people. Stark does, however, have an embedded chest piece, intended as a lifesaving device and capable of interacting with and powering the armor.