demarcation line

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the boundary of a specific area
• Syn:
limit, demarcation
• Derivationally related forms:
demarcate (for: demarcation)
• Hypernyms:
boundary, bound, bounds
• Hyponyms:
edge, city limit, city limits, upper limit, lower limit, three-mile limit