2) Used to describe the characteristics of a living system (for example a creature's body or an entire habitat) consisting of smoothly running interacting parts and shaped by the processes of Darwinian evolution.
3) As an analogy in the creative process, used to describe a work such as a novel or movie script made in such a way that the various parts developed as they were written/painted/whatever, one from another, rather than sticking rigidly to a preconceived plan.
4) In popular culture, a term applied in line with the most rabid intentions of New Age pseudoscience, ultimately from the mouths of people who would like to have scientists burned at the stake. Much favoured by people who use chemical as an unqualified snarl word. Artificial fertilisers are decried as poison, despite the fact that they contain the same chemical compounds that plants derive from "natural" fertilisers; if these compounds were real poisons, our biosphere would have been in serious doo-doo long ago. Anything coming from a lab is allegedly ipso facto evil and foul, even if i...
Mark: "Dude. She never shaved her legs. That's just too organic for me..."
John: "That's messed up."
Guy: Yeah man, that shit right there is fuckin' organic! who the hell thinks of that!
2. Organic apples DO cost twice as much but they're SO worth it! They're hand-picked by sterile forest gnomes riding unicorns!