[nar-oh-kast, -kahst]
verb (used without object), narrowcast or narrowcasted, narrowcasting. Radio and Television.
to aim a program or programming at a specific, limited audience or sales market.

1770–80, for an earlier sense; narrow (broad)cast

broadcast, narrowcast, simulcast. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
narrowcast (ˈnærəʊˌkɑːst)
vb , -casts, -casting, -cast, -casted
1.  (tr) to supply (television programmes) to a small area by cable television
2.  (intr) (of programmers or advertisers) to target a specialized audience on radio or television

Collins English Dictionary - Complete & Unabridged 10th Edition
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