phobia

noun

Etymology: First attested in c. 1790, from words ending in -phobia, ultimately from Ancient Greek φόβος (phóbos, “fear”). Compare ism, from -ism, itis, from -itis, and ana, from -ana.

1. An irrational, abnormal, or obsessive fear (of something).

   “I know someone with a strange phobia of ladders.”

   “It was when anthropophobia set in, when he was made uneasy by people who walked too close to him, that, sagely viewing his list and seeing how many phobias were now checked, he permitted himself to rest.”

2. An aversion or dislike (of something).

   “Some patients have the phobia of light, and others have the phobia of darkness. Another common aversion is that of high places. The phobiac of this type can not sit in the gallery […]”

   “For some children and their parents, however, it can be difficult to determine when fears are typical and when they are developing into more serious phobias or anxiety disorders. […] But once fears become debilitating or impair daily function, they can be classified as a phobia or anxiety disorder, said Thomas Ollendick, University Distinguished Professor Emeritus of Psychology at Virginia Tech, who is known for his work with children and adolescents.”