1. HTTP cookie. 2. A handle, transaction ID, or other token of agreement between cooperating programs. "I give him a packet, he gives me back a cookie". The ticket you get from a dry-cleaning shop is a perfect mundane example of a cookie the only thing it' s useful for is to relate a later transaction to this one (so you get the same clothes back). Compare magic cookie see also fortune cookie. 3. A cracker term for the password list on a multi-user computer. 4. An adjective describing a computer that just became toast. (1997-04-14)