uncanny valley

Meanings

1. A range of appearances, mannerisms, or behaviors of a humanoid figure that are subtly different from a human and thereby cause feelings of discomfort, such as fear or revulsion.
2. Digital or ambiguous physical spaces that create a sense of unease or eeriness due to deviations from familiar patterns that challenge perception and categorization, leading to discomfort. (e.g., liminal spaces, haunted houses, the Backrooms, etc.)

Etymology

Calque of Japanese 不気味の谷 (bukimi no tani), from 不気味 (bukimi, “eerie, uncanny”, of Middle Chinese origin, literally “bad taste and smell”) + の (no, noun modifier particle) + 谷 (tani, “valley”). First used in 1970 by roboticist Masahiro Mori.