/ˈfæntəm ||; ˈfæntəm/noun[C] 1 (written 书面语) the spirit of a dead person that is seen or heard by sb who is still living 幽灵；鬼魂 Ghost is a more common word. ghost较常用。
2 something that you think exists, but that is not real 幻影；幻象: phantom fears/illnesses 幻觉恐惧；幻觉症