Breadcrumb Home > Thesaurus > F Synonyms of firefly Find synonyms for: Noun 1. firefly, fire beetle, Pyrophorus noctiluca, elaterid beetle, elater, elaterid usage: tropical American click beetle having bright luminous spots 2. firefly, lightning bug, beetle usage: nocturnal beetle common in warm regions having luminescent abdominal organs WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of firefly (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: sangfroid Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language