There are many things in this world
that could be put into the category of boredom.
But actually, boredom is a category all to itself.
For you cannot say,
"This class is total boredom," now can you?
No, because boredom is when you sit alone,
thinking about all the things that you could be doing, but can't
because you're stuck in boredom.
That is the true meaning of Boredom.