twilight zone
noun
the lowest level of the ocean that light can reach.
an ill-defined area between two distinct conditions, categories, etc., usually comprising certain features of both; an indefinite boundary: a twilight zone between fantasy and reality.
Origin of twilight zone
First recorded in 1905–10
Words nearby twilight zone
twilight,
twilight glow,
twilight of the gods,
twilight sleep,
twilight state,
twilight zone,
twilit,
twill,
twill weave,
twin,
twin bed
British Dictionary definitions for twilight zone
twilight zone
noun
any indefinite or transitional condition or area
an area of a city or town, usually surrounding the central business district, where houses have become dilapidated
the lowest level of the ocean to which light can penetrate