a small cake made from stiff, sweet dough rolled and sliced or dropped by spoonfuls on a large, flat pan (cookie sheet) and baked.
2.
Informal. dear; sweetheart (a term of address, usually connoting affection).
3.
Slang.
a.
a person: a smart cookie; a tough cookie.
b.
an alluring young woman.
4.
Computers. a message, or segment of data, containing information about a user, sent by a Web server to a browser and sent back to the server each time the browser requests a Web page.
5.
South Atlantic States(chiefly North Carolina). a doughnut.
A small, usually flat and crisp cake made from sweetened dough.
Slang A person, usually of a specified kind: a lawyer who was a tough cookie.
Computer Science A collection of information, usually including a username and the current date and time, stored on the local computer of a person using the World Wide Web, used chiefly by websites to identify users who have previously registered or visited the site.
[Dutch koekje, diminutive of koek, cake, from Middle Dutch koeke.]
cookie (kk'ē) Pronunciation Key
A collection of information, usually including a username and the current date and time, stored on the local computer of a person using the World Wide Web, used chiefly by websites to identify users who have previously registered or visited the site. Cookies are used to relate one computer transaction to a later one.
[koo
k-ee] 
k'ē) Pronunciation Key