ground level

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. the height of the ground on which something stands (Freq. 2)
- the base of the tower was below grade
• Syn:
grade
• Derivationally related forms:
grade (for: grade)
• Hypernyms:
elevation
2. the floor of a building that is at or nearest to the level of the ground around the building
• Syn:
ground floor, first floor
• Hypernyms:
floor, level, storey, story