mor ‧ bid /ˈmɔːbəd, ˈmɔːbɪd $ ˈmɔːr-/ BrE AmE adjective
[ Date: 1600-1700 ; Language: Latin ; Origin: morbidus 'diseased' , from morbus 'illness' ]
1 . with a strong and unhealthy interest in unpleasant subjects, especially death
morbid fascination/curiosity
a morbid fascination with instruments of torture
The trip was made all the worse by Frankie’s morbid fear of flying.
His head was full of morbid thoughts.
2 . medical relating to or caused by a disease:
a morbid gene
—morbidly adverb
—morbidity /mɔːˈbɪdəti, mɔːˈbɪdɪti $ mɔːr-/ noun [uncountable]