1. <World-Wide Web> HTTP cookie.
2. <protocol> 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. <security, jargon> A cracker term for the password list on a multi-user computer.
4. <jargon> An adjective describing a computer that just became toast.
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Nearby terms: cooccurrence matrix « cookbook « cooked mode « cookie » cookie bear » cookie file » cookie jar