be of different opinions
"I beg to differ!"
"She disagrees with her husband on many questions"
To fail to agree; to have a different opinion or belief.
"The two friends disagreed about which movie to watch, each holding a completely different preference."
In plain English: To disagree means to have an opposite opinion from someone else about something.
"We disagree about which restaurant to visit for dinner tonight."
Usage: Use disagree with someone when you hold an opposing view, but use it without the preposition if referring generally to facts or conditions that are not in harmony. Avoid confusing this verb with its noun form disagreement, which names the state of conflict rather than the act itself.
The word "disagree" comes from Middle English and originally meant to refuse assent, evolving from Old French terms that described something being disagreeable or unpleasant. Although it can be broken down into the prefix dis- and agree, its earliest usage specifically referred to rejecting agreement rather than simply holding a different opinion.