supercomputer

noun

A mainframe computer that is among the largest, fastest, or most powerful of those available at a given time.

noun

Any computer that has a far greater processing power than others of its day; typically they use more than one core and are housed in large clean rooms with high air flow to permit cooling. Typical uses are weather forecasting, nuclear simulations and animations.

noun

a mainframe computer that is one of the most powerful available at a given time