noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The quality of being extremely familiar. uncountable
2. 2
   A symptom of certain disorders of the brain where the patient finds everybody or everything familiar, even if not actually known. uncountable

Etymology

From hyper- + familiarity.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.