Definition of "trailblazing"

One can only wonder what led Rothstein to claim that Neville was such a trail-blazing pornographer.

2011, Patrick Spedding, James Lambert, “Fanny Hill, Lord Fanny, and the Myth of Metonymy”, in Studies in Philology, volume 108, number 1, page 120

The trailblazing Oaxacan chef Alejandro Ruiz […] has spiked this black-bean sauce with a hidden depth charge of flavor: patches of foliage from a local avocado tree. The leaves electrify the sauce with an unexpected thrum of black licorice.

2014 October 25, Jeff Gordinier, “In search of the perfect taco”, in T: The New York Times Style Magazine (international edition)‎, page 100