Longman Dictionary of Contemporary English
Wiktionary
n. 1 A tentative government report of a proposal without any commitment to action, being the first step in changing the law; a discussion document. 2 (context Canada English) An official document sponsored by the Crown of propositions put before the nation for discussion.
WordNet
n. a preliminary report of government proposals that is published in order to stimulate discussion
Wikipedia
In the European Union, the United Kingdom, Commonwealth, Hong Kong and the United States, a green paper is a tentative government report and consultation document of policy proposals for debate and discussion, without any commitment to action—the first step in changing the law. Green papers may result in the production of a white paper. They may be considered as grey literature.
Usage examples of "green paper".
Fixed to it were numbers of wires covered with green paper, which Bedelia used for securing vines.
Riding in the Ford with Parker was thirty thousand dollars in green paper, and until he'd found a safe place for that boodle he couldn't afford to do anything else.
Slowly, he opened the it and withdrew a folded light green paper with an embossed seal.
But all he did was to hurl a thick book bound in green paper across at Hogg.
Mina picked up a finished flower at the end of a long piece of wire wrapped in green paper.
The edges were so neatly trimmed that they looked as though they were cut from green paper.