<p><strong>Noun</strong></p><ul><li>the soul of a dead person, a disembodied spirit imagined, usually as a vague, shadowy or evanescent form, as wandering among or haunting living persons</li><li>spook, shade, revenant, wraith, phantasm, phantom, apparition</li><li>a mere shadow or semblance; a trace</li><li>He's a ghost of his former self</li><li>a remote possibility</li><li>He hasn't a ghost of a chance</li><li>(sometimes initial capital letter) a spiritual being</li><li>the principle of life; soul; spirit</li><li>ghostwriter</li><li>a secondary image, especially one appearing on a television screen as a white shadow, caused by poor or double reception or by a defect in the receiver</li><li>a faint secondary or out-of-focus image in a photographic print or negative resulting from reflections within the camera lens</li><li>an oral word game in which each player in rotation adds a letter to those supplied by preceding players, the object being to avoid ending a word</li><li>a series of false spectral lines produced by a diffraction grating with unevenly spaced lines</li><li>a streak appearing on a freshly machined piece of steel containing impurities</li><li>a red blood cell having no hemoglobin</li><li>a fictitious employee, business, etc., fabricated especially for the purpose of manipulating funds or avoiding taxes</li></ul><p><strong>Verb</strong></p><ul><li>to ghostwrite (a book, speech, etc.)</li><li>to haunt</li><li>to lighten the background of (a photograph) before engraving</li><li>to suddenly end all contact with (a person) without explanation, especially in a romantic relationship</li><li>to leave (a social event or gathering) suddenly without saying goodbye</li><li>to remove (comments, threads, or other digital content) from a website or online forum without informing the poster, keeping them hidden from the public but still visible to the poster</li></ul><p><strong>Adjective</strong></p><ul><li>fabricated for purposes of deception or fraud</li></ul>