Other forms: premiers
Premier is another way of saying “first” or “best” like the premier ice cream store on the block that always has a line snaking around the corner. In a political sense a premier is a head of state.
As adjective or noun, this word has to do with whatever’s first and foremost. Leaders of countries are often called premiers, since they’re the first, most important people in government — like how we call the President's wife the “First Lady.” If you’re referring to something that started first, is the best, or is the head of a country, choose premier unless first will do!