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.
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
In 2012, a team of researchers investigating reports of synchronous fireflies stayed at their bed-and-breakfast in Kellettville, Pa., a small community surrounded by Allegheny National Forest.
From The Wall Street Journal ● Jun. 3, 2026
When they were younger, we did fireworks, BBQ, a summer night alive with fireflies and bullfrogs, all that stuff.
From Salon ● May 31, 2026
I could see it flashing in her dark eyes like the clouds of fireflies that made summer nights frantic with light.
From "The Marrow Thieves" by Cherie Dimaline
