Learner's definition of SCRUTINY
: the act of carefully examining something especially in a critical way: the act of scrutinizing something
the close/careful scrutiny of data
I'd never faced that kind of scrutiny before.
Because of their past crimes, everything they do now will be subject to scrutiny.
Their behavior is under scrutiny again. = Their behavior has come under scrutiny again. [=people are examining their behavior in a critical way again]