monologist noun. 
[mǝ'nɒlǝdʒɪst, 'mɒn(ǝ)lɒgɪst] Also monologuist 
[-gɪst]. 
E18.[from MONOLOGUE + IST.]1.  A person who talks in monologue or soliloquizes. Also, a person who monopolizes conversation. 
E18.2.  A person who performs monologues. 
M19.  [TahlilGaran] English Dictionary ▲