ILL-DEFINED

\ˈɪldɪfˈa͡ɪnd], \ˈɪldɪfˈa‍ɪnd], \ˈɪ_l_d_ɪ_f_ˈaɪ_n_d]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd