Standard Lemma guide

defoliant

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /diːˈfəʊlɪənt/
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: D IH0 F OW1 L IY0 AH0 N T Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

An agent used to defoliate plants.

Definition source: English Wiktionary via Wiktextract

Examples

  • Agent Orange is a defoliant.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a chemical that is sprayed on plants and causes their leaves to fall off

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: compound, chemical compound

History

Etymology

Etymology tree English defoliate Latin -ns Latin -āns Old French -antbor. Proto-Indo-European *-onts Proto-Germanic *-ndz Proto-West Germanic *-andī Old English -ende Middle English -ant English -ant English defoliant From defoliate + -ant.

Across languages

Translations

8 source translations are retained for this English entry.

  • Catalan: defoliant — agent used to defoliate plants
  • French: défoliant — agent used to defoliate plants
  • German: Entlaubungsmittel — agent used to defoliate plants
  • Italian: defoliante — agent used to defoliate plants
  • Korean: 고엽제 (goyeopje) — agent used to defoliate plants
  • Polish: defoliant — agent used to defoliate plants
  • Spanish: defoliante — agent used to defoliate plants
  • Ukrainian: дефоліант (defoliant) — agent used to defoliate plants