Meaning of TRIANGLE in English
A ~ is an object, arrangement, or flat shape with three straight sides and three angles.
Its outline roughly forms an equilateral ~.
...~s of fried bread.
The ~ is a musical instrument that consists of a piece of metal shaped like a ~. You play it by hitting it with a short metal bar.
N-COUNT: usu sing, the N
If you describe a group of three people as a ~, you mean that they are all connected with each other in a particular situation, but often have different interests.
She plays a French woman in a love ~ with Jonathan Pryce and Christopher Walken.
N-COUNT: usu sing, with supp
see also eternal ~
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012