BLOCKING

\blˈɒkɪŋ], \blˈɒkɪŋ], \b_l_ˈɒ_k_ɪ_ŋ]\
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2006 - WordNet 3.0
By Princeton University
 
2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.