Phrase guide

projective geometry

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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1

noun

Meaning 1

The branch of mathematics that investigates those properties of figures that are invariant under homographies, special kinds of spaces called projective spaces, and the geometric structures that inhabit them.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

the geometry of properties that remain invariant under projection

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: descriptive geometry

Antonyms: none provided

Broader terms: geometry

History

Etymology

No etymology was provided for this word.

Across languages

Translations

9 source translations are retained for this English entry.

  • Finnish: projektiivinen geometria — branch of mathematics
  • French: géométrie projective — branch of mathematics
  • Galician: xeometría proxectiva — branch of mathematics
  • Italian: geometria proiettiva — branch of mathematics
  • Japanese: 射影幾何学 (shaei kikagaku) — branch of mathematics
  • Macedonian: проекти́вна геоме́трија (proektívna geométrija) — branch of mathematics
  • Polish: geometria rzutowa — branch of mathematics
  • Russian: проекти́вная геоме́трия (projektívnaja geométrija) — branch of mathematics
  • Serbo-Croatian: projektivna geometrija — branch of mathematics