If you still wondering what business casual means, then you should know it's a more relaxed look of business professional dress code and it still comes with tailored and official looking details. (fashiongum.com)
It wasn't long ago that professional dress for lawyers was constrained and predictable. (abajournal.com)
If you're going to a career fair on your college campus, I'd still recommend business professional dress. (campus-to-career.com)