Breadcrumb Home > Dictionary > Index A ailanthus: Meaning and Definition of Find definitions for: ai•lan•thus Pronunciation: (ā-lan'thus), [key] — pl. -thus•es. any tree belonging to the genus Ailanthus, of the quassia family, esp. A. altissima, widely grown in cities. Cf. tree of heaven. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ailanthus (Thesaurus) ail ailanthus silkworm TrendingHere are the facts and trivia that people are buzzing about. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: concatenate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language