triangle

noun

1. a three-sided polygon

Similar word(s): trigon, trilateral

Definition categories: shape, polygon

2. something approximating the shape of a triangle

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

Definition categories: shape, form

3. a small northern constellation near Perseus between Andromeda and Aries

Similar word(s): triangulum

Definition categories: object

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

Definition categories: man–made

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

Definition categories: man–made