Noun
A flag consisting of three stripes.
An optical illusion, the Penrose triangle.
A lexicographic symbol consisting of three vertically stacked dashes (≡) sometimes used to represent logical equivalence.
Triathlon handlebars on a bicycle.
(automotive) The arrangement of the signature stacked lights on a Ford Mustang.
A concrete structure made up of three lengths, or bars, separated by air pockets, which is used to construct revetments such as breakwaters.
An equilateral triangle shaped weight,made for strength and conditioning, used for exercise and core workouts
Source: en.wiktionary.org