Definition of claustrophobia noun from the Oxford Advanced Learner's Dictionary

 

claustrophobia

 noun
noun
BrE BrE//ˌklɔːstrəˈfəʊbiə//
 
; NAmE NAmE//ˌklɔːstrəˈfoʊbiə//
 
[uncountable]
 
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an extreme fear of being in a small confined place; the unpleasant feeling that a person gets in a situation which restricts them to suffer from claustrophobia She felt she had to escape from the claustrophobia of family life. I hate lifts—they give me claustrophobia. compare agoraphobia Word Origin late 19th cent.: modern Latin, from Latin claustrum ‘lock, bolt’ + -phobia (see phobia).
See the Oxford Advanced American Dictionary entry: claustrophobia