Know how to use "fewer" and "less"? Find out.
word-forming element meaning "excessive or irrational fear of," from Latin -phobia and directly from Greek -phobia "panic fear of," from phobos "fear" (see phobia). In widespread popular use with native words from c.1800. Related: -phobic.
An intense, abnormal, or illogical fear of a specified thing: claustrophobia.