1. existing or occurring between galaxies

Examples

• Scientists study intergalactic space to understand the universe better.
• The movie featured an intergalactic war between alien civilizations.
• Intergalactic travel remains purely theoretical at this point.
• Astronomers detected intergalactic gas clouds between the Milky Way and Andromeda.
• The science fiction novel described intergalactic trade routes.
• Intergalactic distances are measured in millions of light-years.