The phrase "wide swathe" means a large area or extent. It describes a wide and extensive coverage or impact of something over a particular space or subject. Full definition
The Cleantech sector can not be dismissive of the concerns of those who point to wind turbines dramatically altering the landscape of wide swathes of rural Ontario. (marsdd.com)
And this is precisely what is now happening across wide swaths of American society. (educationnext.org)
He says the services could fill a void in wide swaths of upstate that have no taxi services. (nynow.wmht.org)