firefly
noun
any nocturnal beetle of the family Lampyridae, characterized by a soft body with a light-producing organ at the rear of the abdomen.
fireflies
-
pluralof firefly.plural
The grammatical form denoting more than one person, place, thing, or idea.
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.
Animals such as fireflies produce their own light through chemical reactions, while fluorescent organisms must first absorb light from their surroundings.
From Science Daily ● Oct. 28, 2026
He has also used the technology for art installations with flexible rods that, when speared into the ground, have tips that glow in the dark like fireflies on tall grass.
From Barron's ● Aug. 5, 2026
The trick is also shared by certain squid and jellyfish species, as well as insects such as fireflies and glow-worms.
From BBC ● Jun. 25, 2026
Nature-loving travelers from around the globe are bugging out over the fireflies, descending en masse on isolated stretches of the U.S.
From The Wall Street Journal ● Jun. 3, 2026
Danny realized that what he had thought were fireflies were floating back up to the sky.
From "The Way to Rio Luna" by Zoraida Cordova
