Definition of triangular
1 a
: of, relating to, or having the form of a triangle
- a triangular plot of land
b
: having a triangular base or principal surface
- a triangular table
- a triangular pyramid
2 a (1)
: of, relating to, or involving three elements
- a triangular agreement
(2)
of a military group
: based primarily on three units
b
: of or relating to a love triangle
