Meaning of the word "fault line" in English

What does "fault line" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

fault line

US /ˈfɑːlt laɪn/
UK /ˈfɔːlt laɪn/
"fault line" picture

Noun

1.

a line on a rock surface or the ground that traces a geological fault

Example:
The city is built directly on a major fault line.
Geologists are monitoring the fault line for any signs of activity.
2.

a divisive issue or difference of opinion that is likely to cause serious problems or conflict

Example:
The debate revealed deep fault lines within the political party.
Economic inequality is a major fault line in modern society.