- extremely critical.
- Physics. pertaining to a mass of radioactive material in which the rate of a chain reaction increases with time.
Origin of supercritical
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for supercritical
The practical person, the wary pedant, and the supercritical will scoff at this, but let it stand.Dickens' London
- physics (of a fluid) brought to a temperature and pressure higher than its critical temperature and pressure, so that its physical and chemical properties change
- nuclear physics of or containing more than the critical mass