green flag

American

noun

(in automobile racing) a green-colored flag that is used to signal the start of a race.

Green Flag British

noun

an award given to a bathing beach that meets EU standards of cleanliness

"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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Each year, Bani Walid celebrates the anniversary of a 1969 coup that brought Gaddafi to power, with people parading through the streets with portraits of the ex-leader and Libya's green flag from before the revolt.

From Barron's • Feb. 6, 2026

But one of the most controversial aspects of Tea is that it allows women to share information on men they have dated to "avoid red flags" but also highlight those with "green flag" qualities.

From BBC • Jul. 26, 2025

Instead, these athletes will compete under a designated green flag.

From Salon • Jul. 25, 2024

The race was delayed for about 30 minutes at the start because of rain, and the cars circled the track for several laps hoping to help dry the track before the green flag flew.

From Seattle Times • Mar. 31, 2024

There’s a red, black, and green flag with a golden lion in the middle of it painted on its tail.

From "The Manifestor Prophecy" by Angie Thomas

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023