She seized the opportunity to deliver tough reforms that a more effectiveopposition might have stopped.
Times, Sunday Times (2016)
We need to be not just an effectiveopposition but an alternative government.
Times, Sunday Times (2015)
Effectiveopposition entails more than shouting down the government.
Times, Sunday Times (2010)
Definition of 'opposition'
opposition
(ɒpəzɪʃən)Explore 'opposition' in the dictionary
countable noun [with singular or plural verb] [usually singular]
In a country's parliament or legislature, the opposition refers to the politicians or political parties that form part of the parliament or legislature,but are not the government.