Definition of opposition research in English:

opposition research

Syllabification: opp·o·si·tion re·search

noun

US
Investigation into the dealings of political opponents, typically in order to discredit them publicly: opposition research may be a bit too confrontational in the normal course of a campaign but completely appropriate as a response to an attack
More example sentences
  • Admittedly, much of what one "knows" about candidates comes from opposition research.
  • The gathering, use, and online storage of opposition research is nothing new.
  • Lengthy primary battles result in competing candidates essentially digging up and airing free opposition research for the other party.

Definition of opposition research in:

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Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude