Xenon
Although this particular motif is rare, it means something valuable to come. Maybe some form of knowledge that you were not aware of, or something that will enrich or expand your current mental or physical state.
Xenophobia
When you dream of being a xenophobe, it symbolizes pointless pride. If you dream of accusing someone of being a xenophobe, it means that you will wrong someone.
Xylophone
If you dream of a xylophone, it symbolizes romantic moments in real life. Playing the xylophone in a dream symbolizes unexpected happiness.