Earth Day

[ urth-dey ]

  1. April 22, a day set aside globally for raising awareness about environmental issues and participating in events to help protect the environment.

Origin of Earth Day

First recorded in 1970

Words Nearby Earth Day Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use Earth Day in a sentence

  • In honor of Earth Day, environmentalist Bill McKibben picks his five favorite books about nature and conservation.

    My Favorite Environmental Books | Bill McKibben | April 21, 2010 | THE DAILY BEAST
  • Renata Espinosa highlights the sustainable and chic fashions you will actually want to buy this Earth Day.

    The Earthiest Fashion on Earth | Renata Espinosa | April 22, 2009 | THE DAILY BEAST
  • No water in fountains, water in toilets only during part of an Earth-day.

    The Planet Strappers | Raymond Zinke Gallun
  • A dark shadow blotted out the brightness of the Earth-day for him.

    Slaves of Mercury | Nat Schachner
  • Despite the heavy cloud cover, the afternoon was as bright as an Earth-day.

    Wind | Charles Louis Fontenay
  • The local day would be something more than an Earth-day in length.

    Operation: Outer Space | William Fitzgerald Jenkins