American English

Definition of frank verb from the Oxford Advanced American Dictionary

 

frank

 verb
verb
NAmE//fræŋk//
 
[often passive] frank somethingVerb Forms present simple I / you / we / they frank
 
he / she / it franks
 
past simple franked
 
-ing form franking
 
 
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to stamp a mark on an envelope, etc. to show that the cost of mailing it has been paid or does not need to be paid
See the Oxford Advanced Learner's Dictionary entry: frank