clearance

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. the distance by which one thing clears another;
the space between them (Freq. 1)
• Derivationally related forms:
clear
• Hypernyms:
interval, separation
2. vertical space available to allow easy passage under something
• Syn:
headroom, headway
• Hypernyms:
room, way, elbow room
3. permission to proceed
- the plane was given clearance to land
• Derivationally related forms:
clear
• Hypernyms:
license, permission, permit

• Từ đồng nghĩa / Synonyms:
  headroom, headway