fēn​jiè​xiàn

dividing line

分界线 分界線 fēn​jiè​xiàn
dividing line noun
line of demarcation; physical boundary marking the separation of two regions

The equator is the boundary between the northern and southern hemispheres.

boundary
metaphorical or abstract line that separates distinct things; dividing line of separation between concepts

Frequency

Movie subtitles
0.780 per million appears in 0% of films
Written text
2.09 per million

Sources