Being scrutinized, examined, or monitored very carefully. Often modified by words such as "careful" or "close" between "under" and "scrutiny." The government kept the company under close scrutiny on suspicion of tax evasion and money laundering. You'll be under scrutiny during this probationary period of your employment.
*under (close) scrutiny
Fig. being watched or examined closely. (*Typically: be ~; have someone or something ~; keep someone or something ~.) The suspect was kept under scrutiny throughout the investigation.