borderland

/ˈbɔːrdərlænd/
noun
  1. An area of land near or on a border between two countries or regions.
    • They built a small village in the borderland where cultures mixed.
    • Smugglers often operated in the remote borderland.
    • The borderland between the two nations was a peaceful farming region.
  2. A vague or intermediate state or area between two conditions or categories.
    • Adolescence is a borderland between childhood and adulthood.
    • The artist worked in the borderland between painting and sculpture.
    • The concept exists in the borderland of science and philosophy.
Antonyms
What does "borderland" mean? | whatsthatwordmean | whatsthatwordmean