Considering various contexts where we need definitions of phrases, we evaluated our method with four datasets including WordNet<cite> (Noraset et al., 2017)</cite> for general words, the Oxford dictionary (Gadetsky et al., 2018) for polysemous words, Urban Dictionary (Ni and Wang, 2017) for rare idioms or slangs, and a newlycreated Wikipedia dataset for entities. Experimental results demonstrate the effectiveness of our method against the three baselines stated above (Noraset et al., 2017; Ni and Wang, 2017; Gadetsky et al., 2018) .