# triangular

/tɹaɪˈæŋɡjəɫɝ/ (US) · /tɹaɪˈænɡjʊlɐ/ (UK)

Source: https://englishreference.com/word/triangular
Updated: 2026-08-08

## Senses

### 1. shaped like a triangle

adjective · CEFR B1

having three straight sides and three corners.

For teachers: shaped like a triangle; having three sides and three angles.

- The sailors noticed a triangular fin cutting through the water near the boat.
- The architect incorporated several triangular windows into the roofline to maximize the amount of natural light entering the attic studio.

### 2. involving three parties

adjective · CEFR B2 · Formal

involving three people, groups, or countries.

For teachers: having three elements or involving three distinct parties.

- The three countries signed a triangular trade agreement to help their economies.
- The diplomatic crisis was eventually resolved through a triangular negotiation involving the two warring factions and a neutral mediator.

## Examples

- The sandwich was cut into triangular pieces.
- The architect designed a triangular roof to help the snow slide off more easily during the winter.
- The sailors navigated toward a triangular rock formation that served as a natural landmark for the entrance to the hidden bay.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.