What exactly is the difference between idling, daydreaming, meditating, musing or sitting on sofa with eyes shut and profound boredom? Aren't all these activit

What exactly is the difference between idling, daydreaming, meditating, musing or sitting on sofa with eyes shut and profound boredom? Aren't all these activities doing the same thing, giving the brain pause to calm down, to refocus. Perhaps our brains require idle times as our bodies need pause after exercise.