n. pl. cook·ies 1. A small, usually flat and crisp cake made from sweetened dough.
2. Slang A person, usually of a specified kind: a lawyer who was a tough cookie.
3. Computers 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.