Boredom is flat and featureless. It is blah and the response is always that everything is cliche'. It is the view that it's all been done before and the world can offer nothing of interest to the mind that is bored.
Boredom is slow hell. It is not at all too painful or unbearable which makes it all the more hopeless and dull because when the pain is present and agonizing at least the mind can always take comfort in the idea that this could not possibly last forever. Boredom, however, has the nagging feature of being so constituted as to be capable, at least in appearance, of going on indefinitely.
Boredom is finding others of no interest. It is lacking emotive connection in any positive direction to any thoughts or ideas that may pass through one's consciousness. It is not so bad yet the implications of lack of any interest combined with any affect when one scans the possibilities of doing something like reading, socializing, or playing, can be dreadful.
Boredom is often the beginning of a deeper depression and boredom can be a sign that one's mind is lacking energy and/or focus.
To be bored is to have no interest in anything and no matter what thoughts cross the consciousness of one's mind or no matter what ideas are entertained, there is no positive emotional reaction associated with any of them.
Boredom is not a horribly bad emotional state but it can lead to depression in the sense that nothing entertaining or interesting in life can begin a spiral from simple disinterest to a sense of futility in trying to become interested.
To be bored is like a flat, grey plain with no features and no topographical features. The horizon is grey, the sky is grey, and nothing appears any more distinct or interesting than anything else.
Boredom often comes with a lack of all attachment to the range of possible activities one could partake in, be it an activity in the mind or in the physical world (or "energy world", perhaps is more appropriate).
Boredom is the father of discontent and depression because it is emotionally draining to remain in a state where nothing is of any particular interest. I use spare moments to create new pages, graphics, and writing on this website (hiartx.com) because I typically find it both enjoyable and worthwhile to do so.
Sometimes I can paint. And, in the off chance I have a period of relative solitude and time to myself, I can write fiction. All of these are hobbies or passtimes that I usually can take some degree of interest in if not find myself totally absorbed in.
Playing with my triplet toddler children, for example, is never boring. But, in a state of depression perhaps after a hypomanic period (I am bipolar or manic-depressive), extreme lack of emotional affect goes hand in hand with overbearing boredom to the point where all I seek is sleep or passive entertainment from movies or television in order to pass the time until I feel better.
I try to pass the down time as quickly and mindlessly as possible so that I may once again come to a mental state in which I am generally elated to be able to create (through writing or painting) or to spend time with my loved ones.
Boredom, more than anything, is annoying and bleak without being so bad as to cause great suffering. But, boredom can range from a simple lack of interest in a particular thing or activity that has been exhausted with respect to an individual's desire to continue it all the way to complete lack of interest in anything at all.
The former type of boredom, I think, is normal when we have done too much of one thing that has caused us to be burnt out on it. The latter type of boredom, perhaps absolute boredom, is the form that doesn't allow an individual to become interested or excited by anything and is the form of boredom that this page has focused on.
