/ ˈfəʊbiə; NAmE ˈfoʊ-/ noun
1.
a strong unreasonable fear of sth :
He has a phobia about flying.
2.
-phobia (in nouns) a strong unreasonable fear or hatred of a particular thing :
claustrophobia
xenophobia
—compare -philia
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WORD ORIGIN
late 18th cent.: independent usage of -phobia via Latin from Greek .