noun · verb · 5 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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/ˈbɔː.ɹæks/
Southern-England:Recorded audio is listed in the source snapshot.
US:/ˈbɔɹ.æks/
rhymes with -ɔːɹæks
CMU ARPABET:B AO1 R AE2 K S
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
A white or gray/grey crystalline salt, found in nature as a mineral, with a slight alkaline taste, used as a flux, in soldering metals, making enamels, fixing colors/colours on porcelain, and as a soap, etc.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable, usually
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
The sodium salt of boric acid, Na2B4O7, either anhydrous or with 5 or 10 molecules of water of crystallization.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: sodium tetraborate, mul:E285
Antonyms: none provided
Broader terms: borate, compound, substance, stuff
3
noun
Meaning 3
Cheap or tawdry furniture or other works of industrial design.
Definition source: English Wiktionary via Wiktextract
Usage: attributive, sometimes, uncountable, usually
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
verb
Meaning 4
To treat with borax.
Definition source: English Wiktionary via Wiktextract
Usage: transitive
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
an ore of boron consisting of hydrated sodium borate; used as a flux or cleansing agent
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: mineral
History
Etymology
Etymology tree Middle Persian *bōragbor. Arabic بَوْرَق (bawraq)der. Medieval Latin boraxder. Anglo-Norman boreisbor. Middle English boras English borax From Middle English boras, from Anglo-Norman boreis, from Medieval Latin borax, baurach (“borax”), from Arabic بَوْرَق (bawraq), from Middle Persian bwlk' (bōrag), which yielded Persian بوره (bure).
Across languages
Translations
43 source translations are retained for this English entry.