Definition of "blindingly"

And finally, Jimi Hendrix and the Band of Gypsies – or Gypsy Sun and Rainbows – play their first-ever show, for two hours, and it is blindingly great.

2019 August 15, Bob Stanley, “'Groovy, groovy, groovy': listening to Woodstock 50 years on – all 38 discs”, in The Guardian‎