/ Dictionary / Index J June bug: Meaning and Definition of Find definitions for: June' bug" Pronunciation: [key] Also calledany of several large, brown beetles of the genus Phyllophaga, of the scarab family, appearing in late spring and early summer. See a firefly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Juneberry June grass Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language