Semi Formal Clothing For Men What Is Semi-formal For Men?

What is semi-formal for men? - semi formal clothing for men

I have an event today on my campus, and I have to wear semi-formal. I asked my mother told me a khaki pants and shoes inside the Nice Nice is a good thing, my girlfriend said the same pole.

But I searched online, and seems to be semi-shirt into his pants stuck with a formal tie.

What is it? I need to know soon.