verb

examine (something) in order to determine its accuracy, quality, or condition, or to detect the presence of something.

customs officers have the right to check all luggage

examine,inspect,look at,look over,scrutinize,scan,survey,study,investigate,research,probe,dissect,explore,look into,inquire into,go into,go over with a fine-tooth comb,check out,test,monitor,review,give something a/the once-over,give something a look-see,give something a going-over