[Vocabulary] overshadow

[ZigZ4g]

Hello everyone

What does overshadow mean in this context?

Reports that the US government is poised to designate the IRGC as a terrorist group have sparked jitters in Tehran, overshadowing Donald Trump’s expected plan to tear up the landmark nuclear deal.

Source: https://www.theguardian.com/world/2...r-is-irans-revolutionary-guard-a-terror-group

 

[teechar]

As a small exercise for you, take a look at the definitions in the link below, and tell us which one you think fits the above context.

https://en.oxforddictionaries.com/definition/overshadow