Oxford Dictionary English store detective nounnoun BrE BrE//ˈstɔː dɪtektɪv// ; NAmE NAmE//ˈstɔːr dɪtektɪv// Add to my wordlistjump to other results a person employed by a large shop/store to watch customers and make sure they do not steal goodsSee store detective in the Oxford Advanced American DictionaryCheck pronunciation: store detective oxfordlearnersdictionaries.com