difference of opinion is a noun meaning "a disagreement or argument about something important". It carries one recorded sense.
a disagreement or argument about something important
“he had a dispute with his wife”
“there were irreconcilable differences”
“the familiar conflict between Republicans and Democrats”
Definitions, synonyms and semantic relations for difference of opinion come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.