1. A chemical or nuclear reaction that is deliberately managed and regulated to proceed at a desired rate, typically for safety or efficiency purposes
The nuclear power plant operates through a controlled reaction process.
A usina nuclear funciona através de um processo de reação controlada.
2. An emotional or behavioral response that is deliberately restrained or managed with awareness and discipline
She maintained a controlled reaction despite the shocking news.
Ela manteve uma reação controlada apesar da notícia chocante.