Tailor
Polygraph examiner
Briefcase is a noun.
The lawyer opened his briefcase.The thief ran away with my briefcase.
The possessive form of the singular noun briefcase is briefcase's.example: My briefcase's strap is broken.
The plural of briefcase is briefcases
There are many places where one can purchase a men's briefcase. The best place to purchase a men's briefcase is at a local luggage store or briefcase store.
We were unable to squeeze an executive briefcase in.
I carried my briefcase with me through the airport.
THe UK Chancellor's briefcase is red.
The Briefcase kind, obviously...
It means "an activity in which a person is engaged".