American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
Elsewhere on the web
Apparently, Paley is also looking for sites to host the movie under her "copyleft" agreement.— Toon Zone News
It's a reciprocal or "copyleft" license in that in order to be allowed the right to redistribute the software (normally forbidden under copyright law) the distributor has to agree to make the source code available to the recipient under exactly the same terms.— LXer Linux News
Such licenses provide the ideal balance of freedom versus limitations, and projects that use them are overwhelmingly more successful than ones that don't (both those with more free "non-copyleft" licenses and those with more restrictive "non-free" licenses).— LXer Linux News
Therefore copyleft is very important to the morale of contributors and to the sustainable interest of the community of developers.— LXer Linux News
A concept in competition with the idea of copyleft is the "non-commercial" license, which attempts to restrict the use of a work for "commercial" purposes.— LXer Linux News

American Heritage Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a year.
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