邪灵，指邪恶的灵体，在圣经也有提到。在中国也指鬼魂。

奇幻小说等文学作品常会为了表现宏大的、有史诗感的矛盾冲突而使用恶魔的意象。在这类作品中，恶魔被描写为神及天使的对立面，但并不一定是邪恶的。

《神曲》《失乐园》等名著中也出现了恶魔的形象。这类作品中的恶魔比较接近基督教的描述。

A demon (from Koine Greek δαιμόνιον daimonion), or fiend is a supernatural, often malevolent being prevalent in religion, occultism, literature, fiction, mythology and folklore.

The original Greek word daimon does not carry the negative connotation initially understood by implementation of the Koine δαιμόνιον (daimonion), and later ascribed to any cognate words sharing the root.