| Noun | 1. | cookie jar - a jar in which cookies are kept (and sometimes money is hidden) Synonyms: cooky jar |
| 1. | (programming) | cookie jar - An area of memory set aside for storing cookies. Most commonly heard in the Atari ST community; many useful ST programs record their presence by storing a distinctive magic number in the jar. Programs can inquire after the presence or otherwise of other programs by searching the contents of the jar. | |
| 2. | (security) | cookie jar - A cracker term for the password file of a multi-user computer. |