What does Triangle mean?

Definitions for Triangle
ˈtraɪˌæŋ gəltri·an·gle

This dictionary definitions page includes all the possible meanings, example usage and translations of the word Triangle.

Princeton's WordNet

  1. triangle, trigon, trilateralnoun

    a three-sided polygon

  2. trianglenoun

    something approximating the shape of a triangle

    "the coastline of Chile and Argentina and Brazil forms two legs of a triangle"

  3. Triangulum, Trianglenoun

    a small northern constellation near Perseus between Andromeda and Aries

  4. trianglenoun

    any of various triangular drafting instruments used to draw straight lines at specified angles

  5. trianglenoun

    a percussion instrument consisting of a metal bar bent in the shape of an open triangle


  1. trianglenoun

    A polygon with three sides and three angles.

  2. trianglenoun

    A percussion instrument made by forming a metal rod into a triangular shape which is open at one angle. It is suspended from a string and hit with a metal bar to make a resonant sound.

  3. trianglenoun

    A triangular shaped piece of equipment used for gathering the balls into the formation required by the game being played.

  4. trianglenoun

    A love triangle.

  5. trianglenoun

    The structure of systems composed with three interrelated objects.

  6. Trianglenoun

    The area comprising the cities of Raleigh, Durham and Chapel Hill in North Carolina. Used with "the" except when attributive.

  7. Etymology: From triangle.

Samuel Johnson's Dictionary

  1. TRIANGLEnoun

    A figure of three angles.

    Etymology: triangle, Fr. triangulum, Lat.

    The three angles of a triangle are equal to two right ones. John Locke.


  1. Triangle

    A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted △ A B C {\displaystyle \triangle ABC} . In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane (i.e. a two-dimensional Euclidean space). In other words, there is only one plane that contains that triangle, and every triangle is contained in some plane. If the entire geometry is only the Euclidean plane, there is only one plane and all triangles are contained in it; however, in higher-dimensional Euclidean spaces, this is no longer true. This article is about triangles in Euclidean geometry, and in particular, the Euclidean plane, except where otherwise noted.


  1. triangle

    A triangle is a polygon with three edges and three vertices. It is the simplest possible polygon. The sum of the internal angles in a triangle always equals 180 degrees. Triangles can be classified based on the relationship of their sides and angles such as equilateral (all sides are equal), isosceles (two sides are equal), scalene (no sides are equal), right-angled (one angle is a right angle), obtuse (one angle is greater than 90 degrees), and acute (all angles are less than 90 degrees).

Webster Dictionary

  1. Trianglenoun

    a figure bounded by three lines, and containing three angles

  2. Trianglenoun

    an instrument of percussion, usually made of a rod of steel, bent into the form of a triangle, open at one angle, and sounded by being struck with a small metallic rod

  3. Trianglenoun

    a draughtsman's square in the form of a right-angled triangle

  4. Trianglenoun

    a kind of frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment, -- now disused

  5. Trianglenoun

    a small constellation situated between Aries and Andromeda

  6. Trianglenoun

    a small constellation near the South Pole, containing three bright stars


  1. triangle

    A triangle is one of the basic shapes in geometry: a polygon with three corners or vertices and three sides or edges which are line segments. A triangle with vertices A, B, and C is denoted . In Euclidean geometry any three points, when non-collinear, determine a unique triangle and a unique plane.

Dictionary of Nautical Terms

  1. triangle

    A geometrical figure consisting of three sides and as many angles. Also, a machine formed by spars for lifting weights, water-casks, &c. Also, a stage hung round a mast, to scrape, paint, or grease it.

Suggested Resources

  1. triangle

    The triangle symbol -- In this Symbols.com article you will learn about the meaning of the triangle symbol and its characteristic.

  2. triangle

    Song lyrics by triangle -- Explore a large variety of song lyrics performed by triangle on the Lyrics.com website.


  1. Triangle

    in Odonata: a small, triangular cell at the junction of cubitus with cubitus 1: a similar cell adjoining it basally is the internal triangle discoidal triangle: cardinal cell; q.v.

British National Corpus

  1. Nouns Frequency

    Rank popularity for the word 'Triangle' in Nouns Frequency: #2919

Anagrams for Triangle »

  1. relating

  2. alerting

  3. altering

  4. integral

  5. teraglin

How to pronounce Triangle?

How to say Triangle in sign language?


  1. Chaldean Numerology

    The numerical value of Triangle in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of Triangle in Pythagorean Numerology is: 5

Examples of Triangle in a Sentence

  1. Robert Palladino:

    We're carrying out the president's direction to end foreign assistance programs with the Northern Triangle.

  2. Jeremy Douglas:

    The illicit drug market here is at a tipping point as synthetic opioid production appears to be migrating into places with deep governance problems like the Golden Triangle, southeast Asia could well become a source of opioids for other parts of the world while these substances get mixed into or displace part of the regional heroin supply.

  3. The EIA:

    There needs to be greater investment [by China] in intelligence-led enforcement to pursue the Chinese businesses and individuals who are running operations at the [Golden Triangle Special Economic Zone]... These shouldn’t be periodic operations that are co-ordinated once a year, but full-time, multi-agency operations.

  4. Donald Trump:

    We were paying them tremendous amounts of money. And we're not paying them anymore. Because they haven't done a thing for us. They set up these caravans, at the Secretary's instruction, we are carrying out the President's direction and ending FY 2017 and FY 2018 foreign assistance programs for the Northern Triangle.

  5. Nancy Pelosi:

    The timing of our trip relates to the migration issue, which is important to our countries in the Northern Triangle as well as in the United States and Mexico.

Popularity rank by frequency of use


Translations for Triangle

From our Multilingual Translation Dictionary

Get even more translations for Triangle »


Find a translation for the Triangle definition in other languages:

Select another language:

  • - Select -
  • 简体中文 (Chinese - Simplified)
  • 繁體中文 (Chinese - Traditional)
  • Español (Spanish)
  • Esperanto (Esperanto)
  • 日本語 (Japanese)
  • Português (Portuguese)
  • Deutsch (German)
  • العربية (Arabic)
  • Français (French)
  • Русский (Russian)
  • ಕನ್ನಡ (Kannada)
  • 한국어 (Korean)
  • עברית (Hebrew)
  • Gaeilge (Irish)
  • Українська (Ukrainian)
  • اردو (Urdu)
  • Magyar (Hungarian)
  • मानक हिन्दी (Hindi)
  • Indonesia (Indonesian)
  • Italiano (Italian)
  • தமிழ் (Tamil)
  • Türkçe (Turkish)
  • తెలుగు (Telugu)
  • ภาษาไทย (Thai)
  • Tiếng Việt (Vietnamese)
  • Čeština (Czech)
  • Polski (Polish)
  • Bahasa Indonesia (Indonesian)
  • Românește (Romanian)
  • Nederlands (Dutch)
  • Ελληνικά (Greek)
  • Latinum (Latin)
  • Svenska (Swedish)
  • Dansk (Danish)
  • Suomi (Finnish)
  • فارسی (Persian)
  • ייִדיש (Yiddish)
  • հայերեն (Armenian)
  • Norsk (Norwegian)
  • English (English)

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:


Use the citation below to add this definition to your bibliography:


"Triangle." Definitions.net. STANDS4 LLC, 2024. Web. 26 Feb. 2024. <https://www.definitions.net/definition/Triangle>.

Discuss these Triangle definitions with the community:


    Are we missing a good definition for Triangle? Don't keep it to yourself...

    Image or illustration of


    Credit »

    Free, no signup required:

    Add to Chrome

    Get instant definitions for any word that hits you anywhere on the web!

    Free, no signup required:

    Add to Firefox

    Get instant definitions for any word that hits you anywhere on the web!

    Browse Definitions.net


    Are you a words master?

    irregularly slashed and jagged as if torn
    • A. lacerate
    • B. naiant
    • C. bristly
    • D. irascible

    Nearby & related entries:

    Alternative searches for Triangle: