n. the eerie, forlorn atmosphere of a place that’s usually bustling with people but is now abandoned and quiet—a school hallway in the evening, an unlit office on a weekend, vacant fairgrounds—an emotional afterimage that makes it seem not just empty but hyper-empty, with a total population in the negative, who are so conspicuously absent they glow like neon signs.
When the couple revisited their oldhome, there was an unmistakable air of kenopsia.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).