Writing on the wall is an idiom that refers to a warning sign of impending doom or misfortune. The crossword solutions for this term are OMEN (4 letters), graffiti (8 letters), PORTENT (7 letters), POST (4 letters), FATE (4 letters), and Mene (4 letters). An OMEN is an event or occurrence that is seen as a sign of future events. Graffiti is writing or drawings made on a wall or other surface, usually without permission. A PORTENT is an event or occurrence that is seen as a sign of future events. A POST is a vertical structure used to support or give warning. FATE is the power believed to control what will happen in the future. Mene is an OMEN or sign of coming events.