Meaning of the word "Apple of discord" in English

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

Apple of discord

US /ˈæp.əl əv ˈdɪs.kɔrd/
UK /ˈæp.əl əv ˈdɪs.kɔːd/

Idiom

a cause of dispute, quarrel, or rivalry

Example:
The inheritance became an apple of discord among the siblings.
Their differing opinions on the project were the main apple of discord.