Standard Lemma guide

protean

adj · noun · 6 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: /ˈpɹəʊ.tɪ.ən/
  • UK: /pɹəʊˈtiː.ən/
  • US: prō'ti-ən
  • US: prō-tē'ən
  • US: /ˈpɹoʊ.tɪ.ən/
  • US: /pɹoʊˈtiː.ən/
  • homophone: (dated) protein
  • US: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.
  • /ˈproʊtiən/
  • CMU ARPABET: P R OW0 T IY1 AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
  • CMU ARPABET 2: P R OW1 T IY0 AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Exceedingly variable; readily assuming different shapes or forms.

Definition source: English Wiktionary via Wiktextract

Examples

  • An amoeba is a protean animalcule.

Meaning relationships

Synonyms: multiform, polymorphic, polymorphous, shapeshifting, chameleon, chameleonic, chameleonlike, diverse, multiversant, pluriform, protean, variform

Antonyms: none provided

2

adj

Meaning 2

Alternative letter-case form of Protean: of or relating to Proteus.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Of or relating to the god Proteus in Greek mythology.

Definition source: English Wiktionary via Wiktextract

Topics: human-sciences, mysticism, mythology, philosophy, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Of or relating to the irregular Neptunian moon named for Proteus.

Definition source: English Wiktionary via Wiktextract

Topics: astronomy, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A protein that has been slightly modified by water, dilute acid, or enzymes, but not modified to the extent of a metaprotein.

Definition source: English Wiktionary via Wiktextract

Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adjective satellite

Meaning 6

taking on different forms

Definition source: Princeton WordNet 3.0

Examples

  • eyes...of that baffling protean grey which is never twice the same

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree Ancient Greek Πρωτεύς (Prōteús)bor. English Proteus Proto-Indo-European *-nós Proto-Italic *-nos Latin -nus Latin -ānus Old French -ainder. Middle English -an English -an English protean From Proteus + -an, referrring to the Greek warden of sea-beasts, renowned for his ability to change shape.

Across languages

Translations

26 source translations are retained for this English entry.

  • Bulgarian: многообразен (mnogoobrazen) — exceedingly variable
  • Bulgarian: многолик (mnogolik) — exceedingly variable
  • Catalan: proteic — exceedingly variable
  • Czech: protéovský — exceedingly variable
  • Dutch: proteïsch — exceedingly variable
  • Dutch: wisselvallig — exceedingly variable
  • Dutch: veelvormig — exceedingly variable
  • Finnish: monimuotoinen — exceedingly variable
  • Finnish: muuntautumiskykyinen — exceedingly variable
  • Finnish: kameleonttimainen — exceedingly variable
  • French: variable — exceedingly variable
  • French: changeant — exceedingly variable
  • French: instable — exceedingly variable
  • French: protéiforme — exceedingly variable
  • German: vielgestaltig — exceedingly variable
  • German: proteisch — exceedingly variable
  • Polish: zmienny — exceedingly variable
  • Serbo-Croatian: protejski — exceedingly variable
  • Serbo-Croatian: nestalan — exceedingly variable
  • Spanish: proteico — exceedingly variable
  • Bulgarian: протейски (protejski) — of or relating to Proteus
  • Dutch: proteïsch — of or relating to Proteus
  • French: protéique — of or relating to Proteus
  • German: proteusartig — of or relating to Proteus
  • Portuguese: proteico — of or relating to Proteus
  • Serbo-Croatian: protejski — of or relating to Proteus