Phrase guide

glass jaw

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

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No pronunciation record was provided for this word.

1

noun

Meaning 1

A fighting vulnerability where one is easily knocked out via a single hard blow to the chin or jaw (due to lack of conditioning, insufficient training, or damage from past cerebral concussions).

Definition source: English Wiktionary via Wiktextract

Topics: boxing, government, hobbies, lifestyle, martial-arts, military, politics, sports, war

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A vulnerability of that sort; a weak spot.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Achilles heel, chink in the armor, glass jaw, kryptonite, soft spot, soft underbelly, vulnerability, weakness, weak spot

Antonyms: none provided

History

Etymology

An allusion to glass being easily breakable.

Across languages

Translations

2 source translations are retained for this English entry.

  • Finnish: lasileuka — sensitive chin or jaw
  • German: Glaskinn — sensitive chin or jaw