1.
foot of a mountain, foothills
The broad, gently sloping area at the base of a mountain or volcano.
2.
base, breadth, range (figurative)
Used figuratively to describe the broad base or wide reach of something, such as the range of people involved in an industry or the spread of a trend.
Kanji: 裾 means hem/skirt/bottom edge; 野 means field/plain. Together they describe the "hem" or bottom edge of a mountain spreading out like fabric.
Common collocations
- 裾野が広い: to have a broad base (literal and figurative)
- 裾野を広げる: to broaden the base/reach
- 山の裾野: the foot of the mountain
Note: Also the name of a city (裾野市) in Shizuoka Prefecture, located at the foot of Mount Fuji.