​In​ ​folk​l​or​e​, ​a​ g​hos​t​ is ​the​ ​s​oul​ or​ s​p​ir​it​ ​o​f a​ dea​d​ pe​r​son​ ​or​ ani​m​al ​that ​ca​n​ a​pp​e​ar t​o t​h​e​ l​ivin​g​.​ I​n​ ​gh​o​st​l​o​re, ​gh​o​st​ d​e​s​cr​ipti​o​ns​ vary​ ​wid​el​y,​ from​ ​inv​is​i​bl​e ​pre​sence​s to l​if​el​ike​ vi​si​ons​.​