from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A form of licensing that encourages the distribution of software at no charge for noncommercial uses.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The philosophy of using copyrights to enforce freedom of information, especially software source code.
- n. A software license that follows this philosophy.
- v. To license under a copyleft license.
After copyright.(American Heritage® Dictionary of the English Language, Fourth Edition)
Pun on copyright. (Wiktionary)