From Longman Dictionary of Contemporary Englishcookiecook‧ie /ˈkʊki/ ●●● S3 W3 noun [countable] 1 
especially American EnglishDF a small flat sweet cake SYN biscuit British English a glass of milk and a cookie a chocolate chip cookie2 → tough/smart cookie3 → that’s the way the cookie crumbles4 technical information that a website leaves in your computer so that the website will recognize you when you use it again5 WOMANBEAUTIFUL/GOOD-LOOKING American English old-fashioned an attractive young woman
especially American EnglishDF a small flat sweet cake SYN biscuit British English a glass of milk and a cookie a chocolate chip cookie2 → tough/smart cookie3 → that’s the way the cookie crumbles4 technical information that a website leaves in your computer so that the website will recognize you when you use it again5 WOMANBEAUTIFUL/GOOD-LOOKING American English old-fashioned an attractive young womanExamples from the Corpus
cookie• Christmas and commercialism, like milk and cookies, have always gone together.• I buy my six-pack and some chocolate chip cookies.• The final cookie has been bought.• molasses cookies• By examining the cookie, Web sites can take note of what other sites you have visited.• Allow to cool slightly before transferring the cookies to a wire rack.• In general, the provincial circuit is a far tougher cookie than its metropolitan counterpart.From Longman Business Dictionarycookiecook‧ie /ˈkʊki/ noun [countable] COMPUTING a file containing information that is sent to your computer when you visit a website, so that the website will recognize you when you use it againMost major websites use cookies to arrange the content of the website in a way that matches your preferred interests.Origin cookie (1700-1800) Dutch koekje, from koek “cake” 