Standard Lemma guide

alkali

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

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.

  • /ˈæl.kəˌlaɪ/
  • ălʹkə-lī'
  • General-American: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: AE1 L K AH0 L AY2 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

One of a class of caustic bases, such as soda, soda ash, caustic soda, potash, ammonia, and lithia, whose distinguishing characteristics are dissolving in alcohol and water, uniting with oils and fats to form soap, neutralizing and forming salts with acids, turning to brown several vegetable yellows, and changing reddened litmus to blue.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Soluble mineral matter, other than common salt, contained in soils of natural waters.

Definition source: English Wiktionary via Wiktextract

Usage: US, Western, countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water

Definition source: Princeton WordNet 3.0

Examples

  • bases include oxides and hydroxides of metals and ammonia

Meaning relationships

Synonyms: base

Antonyms: none provided

Broader terms: compound, chemical compound

Narrower terms: pyridine, purine, imidazole, iminazole, glyoxaline, melamine, cyanuramide, pyrimidine

4

noun

Meaning 4

a mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: salt

History

Etymology

From French alcali, from Medieval Latin alcali, ultimately from Arabic اَلْقِلْي (al-qily, “alkali, ashes of the saltwort”), related to قَلَى (qalā, “to roast in a pan, fry”).

Across languages

Translations

70 source translations are retained for this English entry.

  • Afrikaans: alkali — class of caustic bases
  • Arabic: قَلَوِيّ (qalawiyy) — class of caustic bases
  • Armenian: ալկալի (alkali) — class of caustic bases
  • Azerbaijani: qələvi — class of caustic bases
  • Basque: alkali — class of caustic bases
  • Belarusian: шчо́лач (ščólač) — class of caustic bases
  • Belarusian: луг (luh) — class of caustic bases
  • Bulgarian: основа (osnova) — class of caustic bases
  • Catalan: àlcali — class of caustic bases
  • Chinese Mandarin: 鹼 /碱 (jiǎn) — class of caustic bases
  • Czech: alkálie — class of caustic bases
  • Danish: alkali — class of caustic bases
  • Dutch: alkali — class of caustic bases
  • Esperanto: alkalo — class of caustic bases
  • Estonian: leelis — class of caustic bases
  • Estonian: alkali — class of caustic bases
  • Finnish: alkali — class of caustic bases
  • Finnish: emäs — class of caustic bases
  • French: alcali — class of caustic bases
  • Georgian: ტუტე (ṭuṭe) — class of caustic bases
  • Georgian: ტუტემიწა (ṭuṭemic̣a) — class of caustic bases
  • German: Alkali — class of caustic bases
  • Greek: αλκαλίο (alkalío) — class of caustic bases
  • Hebrew: אלקלי (alkali) — class of caustic bases
  • Hungarian: alkáli — class of caustic bases
  • Hungarian: lúg — class of caustic bases
  • Indonesian: alkali — class of caustic bases
  • Irish: alcaile — class of caustic bases
  • Italian: alcali — class of caustic bases
  • Italian: base — class of caustic bases
  • Japanese: アルカリ (arukari) — class of caustic bases
  • Kazakh: сілті (sıltı) — class of caustic bases
  • Khmer: អាល់កាលី (ʼalkaalii) — class of caustic bases
  • Korean: 알칼리 (alkalli) — class of caustic bases
  • Northern Kurdish: qilê — class of caustic bases
  • Northern Kurdish: qela — class of caustic bases
  • Northern Kurdish: tift — class of caustic bases
  • Latvian: sārmi — class of caustic bases
  • Lithuanian: šarmas — class of caustic bases
  • Macedonian: алкално (alkalno) — class of caustic bases
  • Malay: alkali — class of caustic bases
  • Māori: waipāhua — class of caustic bases
  • Navajo: łeeyáán — class of caustic bases
  • Norwegian Bokmål: alkali — class of caustic bases
  • Norwegian Nynorsk: alkali — class of caustic bases
  • Occitan: alcalí — class of caustic bases
  • Odia: କ୍ଷାର (kṣāra) — class of caustic bases
  • Ossetian: изгӕрт (izgært) — class of caustic bases
  • Persian: قلیا (qaliyâ) — class of caustic bases
  • Persian: شخار (šaxâr) — class of caustic bases
  • Polish: alkalia — class of caustic bases
  • Portuguese: álcali — class of caustic bases
  • Romanian: alcaliu — class of caustic bases
  • Russian: щёлочь (ščóločʹ) — class of caustic bases
  • Serbo-Croatian: алкалије — class of caustic bases
  • Serbo-Croatian: база — class of caustic bases
  • Serbo-Croatian: alkalije — class of caustic bases
  • Serbo-Croatian: baza — class of caustic bases
  • Slovak: alkálie — class of caustic bases
  • Slovene: alkalija — class of caustic bases
  • Sogdian: ܘܝݍܬܪܝ (wižtarγ) — class of caustic bases
  • Spanish: álcali — class of caustic bases
  • Swedish: alkali — class of caustic bases
  • Swedish: alkalie — class of caustic bases
  • Telugu: క్షారము (kṣāramu) — class of caustic bases
  • Thai: ด่าง (dàang) — class of caustic bases
  • Turkish: alkali — class of caustic bases
  • Ukrainian: луг (luh) — class of caustic bases
  • Vietnamese: kiềm — class of caustic bases
  • Welsh: alcali — class of caustic bases
Real reading context

alkali in complete knowledge articles