periphery

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the outside boundary or surface of something (Freq. 4)
• Syn:
fringe, outer boundary
• Derivationally related forms:
fringy (for: fringe), peripheral
• Hypernyms:
boundary, edge, bound

• Từ đồng nghĩa / Synonyms:
  fringe, outer boundary