There are 2 definitions of oppo in English:

oppo1

Line breaks: oppo
Pronunciation: /ˈɒpəʊ/

Entry from British & World English dictionary

noun (plural oppos)

British informal
A colleague or friend: an old oppo of mine

Origin

1930s: abbreviation of opposite number.

Definition of oppo in:

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Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something

There are 2 definitions of oppo in English:

oppo2

Syllabification: op·po
Pronunciation: /ˈäpō
 
/

noun

US
Short for opposition research: they are doing extensive oppo, looking over her public financial records, getting copies of her divorce papers
More example sentences
  • The election was only on Sunday but already these oppo guys are at each other's throats.
  • Since he's only been in the Senate five years, the GOP oppo team will have less of a record to mine.
  • There needs to be greater integration between these campaigns and online volunteers, doing oppo and raising cash.

Definition of oppo in:

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Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something