UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈɡriːnɪ/US:USA pronunciation: respellingUSA pronunciation: respelling(grēnē)

WordReference Random House Unabridged Dictionary of American English © 2020
green•ie  (grēnē),USA pronunciation n. 
  1. [Slang.]an amphetamine pill, esp. one that is green in color.
  2. British Terms[Australian Slang.]a conservationist or environmentalist, esp. one who participates in protest demonstrations.
[1945–50, for def. 1;
green + -ie]

Collins Concise English Dictionary © HarperCollins Publishers::
greenie /ˈɡriːnɪ/ n
  1. Austral informal a conservationist

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