1.NounNormal tissue (or an organ) present at an abnormal part of the body
2.NounThe occurrence of an organism in a number of different habitats
3.NounA space which is alien to what is normal within the society, variably presenting a utopian vision in physical form or serving to segregate subversive elements from the wider society.
"Michel Foucault gave the museum and the mental hospital as two different examples of heterotopias."