What does "bone of contention" mean?

Something that continues to be disputed; something on which no agreement can be reached.

How do you pronounce "bone of contention"?

Pronounced //ˈbəʊn əv kənˈtɛnʃən//.

Common synonyms include: apple of discord, bone to pick, casus belli, catechism, cross question, cross-interrogatory.

/ˈbəʊn əv kənˈtɛnʃən/ noun

noun ·Rare ·Advanced level

Noun

1
Something that continues to be disputed; something on which no agreement can be reached. idiomatic
"It is still a bone of contention whether to go ahead with the original plan in light of the new evidence."
2
the subject of a dispute wordnet

"It is still a bone of contention whether to go ahead with the original plan in light of the new evidence."

A reference to two dogs fighting over the same bone.