Meaning

2 senses
  1. One of a class of triangle-shaped unidentified flying objects, usually with a light in each corner.

  2. Used other than figuratively or idiomatically: see black, triangle.

Forms

plural: black triangles
Singularblack triangle
Pluralblack triangles

regular

See also

neighbours in the dictionary
black triangle — meaning, examples, forms, synonyms | Krumeto