Standard Lemma guide

subtend

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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  • /sʌbˈtɛnd/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • General-American: Recorded audio is listed in the source snapshot.
  • rhymes with -ɛnd

1

verb

Meaning 1

To use an angle to delimit (mark off, enclose) part of a straight or curved line, for example an arc or the opposite side of a triangle.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: mathematics, sciences

Examples

  • A 43° angle subtends an arc of about 0.75 meters on a circle with a radius of 1 meter.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

verb

Meaning 2

To extend or stretch opposite something; to be part of a straight or curved line that is opposite to and delimits an angle.

Definition source: English Wiktionary via Wiktextract

Usage: also, transitive

Topics: mathematics, sciences

Examples

  • A hypotenuse subtends the right angle of a right triangle.
  • An arc measuring about 0.75 meters on a circle with a radius of 1 meter subtends an angle of about 43°.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To form the central angle of a circle underneath an arc.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: mathematics, sciences

Examples

  • The points A and B on the circumference form the arc AB, which subtends the central angle θ.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To stand beneath or close to, as a bract at the base of a flower.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Topics: biology, botany, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

be opposite to; of angles and sides, in geometry

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: delimit

Antonyms: none provided

Broader terms: be

History

Etymology

From Latin subtendere, from sub (“under”) + tendere (“to stretch, extend”), itself a semantic loan from Ancient Greek ὑποτείνω (hupoteínō, “to subtend”), from which hypotenuse also derives. See tend.

Across languages

Translations

12 source translations are retained for this English entry.

  • Ido: klozar arko — to use an angle to delimit part of a straight or curved line
  • Russian: стя́гивать (stjágivatʹ) — to use an angle to delimit part of a straight or curved line
  • Vietnamese: chắn (cung) — to use an angle to delimit part of a straight or curved line
  • Bulgarian: принадлежа (prinadleža) — to extend or stretch opposite something, often to delimit an angle
  • French: sous-tendre — to extend or stretch opposite something, often to delimit an angle
  • German: sich erstrecken gegenüber von — to extend or stretch opposite something, often to delimit an angle
  • German: gegenüberliegen — to extend or stretch opposite something, often to delimit an angle
  • German: abschneiden — to extend or stretch opposite something, often to delimit an angle
  • German: begrenzen — to extend or stretch opposite something, often to delimit an angle
  • Hungarian: bezár — to extend or stretch opposite something, often to delimit an angle
  • Italian: sottendere — to extend or stretch opposite something, often to delimit an angle
  • Turkish: karşılık gelmek — to extend or stretch opposite something, often to delimit an angle