Definition of hallmark verb from the Oxford Advanced American Dictionary

 

hallmark

 verb
verb
NAmE//ˈhɔlmɑrk//
 
hallmark somethingVerb Forms present simple I / you / we / they hallmark
 
he / she / it hallmarks
 
past simple hallmarked
 
-ing form hallmarking
 
 
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to put a hallmark on metal goods
See the Oxford Advanced Learner's Dictionary entry: hallmark