Standard Lemma guide

armyworm

noun · 4 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

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1

noun

Meaning 1

The larva of any of the genera Spodoptera and Mythimna of noctuid moths, which typically feed in large, destructive groups on food crops and grasses.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

larva of fungus gnat that feed on cereals and other grains; they march in large companies in regular order when the food is exhausted

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: fungus gnat, sciara, sciarid

3

noun

Meaning 3

moth whose destructive larvae travel in multitudes

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Pseudaletia unipuncta

Antonyms: none provided

Broader terms: noctuid moth, noctuid, owlet moth

4

noun

Meaning 4

noctuid moth larvae that travel in multitudes destroying especially grass and grain

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: army worm, Pseudaletia unipuncta

Antonyms: none provided

Broader terms: caterpillar

History

Etymology

From army + worm.

Across languages

Translations

1 source translations are retained for this English entry.

  • Portuguese: lagarta-do-cartucho — the larva of any of the genus Spodoptera etc. of noctuid moths