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tree-hugger

[tree-huhg-er]
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noun
  1. an environmentalist, especially one concerned with preserving forests.
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Origin of tree-hugger

First recorded in 1985–90
Related formstree-hug·ging, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for tree-hugger

tree-hugger

noun
  1. informal, derogatory an environmental campaigner
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Word Origin

C20: from the tactic of embracing trees to prevent their being felled
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012