I know what a brief is, now.
There is a real, legal definition: a written legal document used in various legal adversary systems that is presented to a court arguing why a party to a case should prevail. - Wikipedia
My wife, who has now lived through several briefs, could probably provide a more accurate definition. It would be less legal and more real.
Last spring, I had the privilege of working with an attorney to write an amici curiae brief for the MN Supreme Court. We started in January and finished in June. I was consumed.
I have a brief due tonight at midnight; one of the curses of the internet.
Consequently, this past week, I have been consumed.
Consequently, I haven't run much this week. I blame it on the weather... and a brief.