Definition of "ghost"
ghost
/ɡəʊst/
noun
countable and uncountable, plural ghosts
(theater) An understudy.
(attributive, in names of species) Transparent or translucent.
(attributive) Abandoned.
(attributive) Of cryptid, supernatural or extraterrestrial nature.
(attributive) Substitute.
verb
third-person singular simple present ghosts, present participle ghosting, simple past and past participle ghosted
(transitive, intransitive) To ghostwrite.