Definition of specialize verb from the Oxford Advanced American Dictionary

 

specialize

 verb
verb
NAmE//ˈspɛʃəˌlaɪz//
 
[intransitive]specialize (in something)Verb Forms present simple I / you / we / they specialize
 
he / she / it specializes
 
past simple specialized
 
-ing form specializing
 
 
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to become an expert in a particular area of work, study, or business; to spend more time on one area of work, etc. than on others Many students prefer not to specialize too soon. He specialized in criminal law. The store specializes in handmade chocolates.
specialization
 
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NAmE//ˌspɛʃələˈzeɪʃn//
 
noun [uncountable, countable]
See the Oxford Advanced Learner's Dictionary entry: specialize