noun
genuine product; officially licensed product; non-counterfeit article
Refers to a product that is authentic, officially licensed, or not a counterfeit. Commonly used in commercial contexts to distinguish from fake or unauthorized goods.
この店では正規品だけを販売しています。
This store sells only genuine products.
正規品と偽物の見分け方を教えてください。
Please tell me how to tell the difference between a genuine product and a fake.
偽物 is the direct antonym, meaning 'fake' or 'counterfeit'. 正規品 is the authentic counterpart.
Compound of 正規 (seiki, 'regular; official') and 品 (hin, 'goods; article').