Definition of narrowcast verb from the Oxford Advanced Learner's Dictionary

 

narrowcast

 verb
verb
BrE BrE//ˈnærəʊkɑːst//
 
; NAmE NAmE//ˈnæroʊkæst//
 
[intransitive](specialist)Verb Forms present simple I / you / we / they narrowcast
BrE BrE//ˈnærəʊkɑːst//
 
; NAmE NAmE//ˈnæroʊkæst//
 
he / she / it narrowcasts
BrE BrE//ˈnærəʊkɑːsts//
 
; NAmE NAmE//ˈnæroʊkæsts//
 
past simple narrowcast
BrE BrE//ˈnærəʊkɑːst//
 
; NAmE NAmE//ˈnæroʊkæst//
 
past simple narrowcasted
BrE BrE//ˈnærəʊkɑːstɪd//
 
; NAmE NAmE//ˈnæroʊkæstɪd//
 
-ing form narrowcasting
BrE BrE//ˈnærəʊkɑːstɪŋ//
 
; NAmE NAmE//ˈnæroʊkæstɪŋ//
 
 
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to send information by television or the Internet to a particular group of people compare broadcast Word Origin 1930s: back-formation from narrowcasting, on the pattern of broadcasting.
See the Oxford Advanced American Dictionary entry: narrowcast