Definition of referral noun from the Oxford Advanced American Dictionary

 

referral

 noun
noun
NAmE//rɪˈfərəl//
 
[uncountable, countable]referral (to somebody/something)
 
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the act of sending someone who needs professional help to a person or place that can provide it illnesses requiring referral to hospitals to make a referral The report suggests that doctors should reduce their rate of referral (= to specialists).
See the Oxford Advanced Learner's Dictionary entry: referral