1. Incapable of growing and developing independently: The little start-up company had financial problems and proved to be nonviable within a year.
2. Not capable of living, growing, and developing, as an embryo, seed, or plant: The nonviable eggs were separated from the ones which were going to hatch soon.
3. Not practicable or workable; not capable of succeeding: The job Jack had seemed to be nonviable, and was very disappointing, so he quit the next day!