1. A group of software whose source code is available to the general public for the purpose of improvement, modification, etc.
2. Any software released under the GPL, LGPL, or other open source licenses.
3. The stuff that makes Bill Gates' life sad.
Linux, Apache, MySQL, and plenty else is open source - and it's all good stuff.
Any project that is open to anyone anywhere, everyone everywhere.
An idea, invention, project,that is open to general public to allow changes in anyway (Preferably for the better)
Government has to have an opeon source policy for street crime prevention.
Lincolndogs is an open source animation project
Dr Malik applies an open source policy on all his inventions and innovations