Wiktionary
n. preoccupation with oneself to the exclusion of everything else.
WordNet
n. preoccupation with yourself to the exclusion of everything else
Usage examples of "self-absorption".
She took a long, luxurious shower, and with the lazy self-absorption of a cat, she found bliss in grooming and prettifying herself.
And they were different, profoundly different, sharing interests and enthusiasms perfectly incommunicable to any other generation, as if genetic drift or disruptive selection had produced a bimodal distribution, so that members of the old Homo sapiens were now coinhabiting the planet with a new Homo ares, creatures tall and slender and graceful and utterly at home, chattering to each other in a profound self-absorption as they did the work that would make Hellas Basin into a sea.
There was an ignobleness in it—a self-absorption which was almost dishonour.
But not before Caroline had acquired sufficient material for a movie about a woman of enormous charm and perfect self-absorption who throws away every possibility in life because she has never noticed that anyone else exists.