Disagreement (noun)

1. A difference of opinion or a conflict between two or more parties.
2. The act of not agreeing to something.
3. The state of being at odds or not in accord.

Origin:

Late 16th century: from latin dis- (expressing reversal) + agreement.

Examples:

1. There was a disagreement between the two countries over trade policies.
2. The disagreement between the board members resulted in a delay in the project.
3. The disagreement over the budget led to a stalemate in the negotiations.
4. She expressed her disagreement with the proposal by voting against it.
5. The disagreement between the parents and the teachers led to a meeting to resolve the issue.