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op‧po‧si‧tion S2 W1

1 [uncountable] strong disagreement with, or protest against, something such as a plan, law, or system COLLOCATIONS 
face/meet with opposition overcome opposition arouse opposition/arouse the opposition of somebody (=make someone feel disagreement) strong/fierce/intense/stiff opposition public opposition in opposition to something

face/meet with opposition overcome opposition arouse opposition/arouse the opposition of somebody (=make someone feel disagreement) strong/fierce/intense/stiff opposition public opposition in opposition to something
2 in some countries such as Britain, the main political party in the parliament that is not part of the government :
the leader of the Opposition
the opposition
PPG
the leader of the Opposition3 in some countries such as Britain, a political party that is in opposition is in parliament, but is not part of the government :
The Socialists were elected to power after 10 years in opposition.
in opposition
PPG
The Socialists were elected to power after 10 years in opposition.4 [C,U also + plural verb British English] the people who you are competing against :
They played well against good opposition.
They played well against good opposition.5 [uncountable and countable] formal when two things are completely opposite
