English English Wikipedia has an article on:flat affectWikipedia Noun flat affect (plural flat affects) (medicine) Lack of emotion, or of apparent emotion. After the crash he presented a flat affect, a symptom of PTSD. Translations lack of emotion Chinese: Mandarin: 情感平淡 (qínggǎn píngdàn) Finnish: tunteettomuus (fi) Polish: spłycenie afektu n See also anhedonia labile affect