1A dark, intense green colour.
2British A person who is deeply committed to environmental causes or who holds radical or extreme ‘green’ views. In plural (often): a faction adhering to such views within a larger environmentalist group or political party.
1Of a dark, intense green colour.
2British Deeply committed to environmental causes; designating, involving, or holding radical or extreme ‘green’ views.
Early 17th century; earliest use found in Philemon Holland (1552–1637), translator. From deep + green.