1. An essential part or element of a system, process, or structure that is vital to its proper functioning or success
The cooling system is a critical component of the engine.
O sistema de resfriamento é um componente crítico do motor.
2. A part that requires careful attention or monitoring due to its importance in maintaining system integrity
Server redundancy is a critical component of our infrastructure.
A redundância de servidores é um componente crítico de nossa infraestrutura.