An intergalactic journey or object is one that takes place between galaxies. The word "inter" means 'between' and "galactic" refers to space and galaxies.
When we talk about things being intergalactic, it usually means they are on a huge scale, relating to the universe as a whole. Scientists often use this term when discussing distant stars, planets, or even civilizations in other galaxies. For example, if someone says an alien species has been detected on a nearby planet that orbits another galaxy, they're talking about something intergalactic. It's also used in science fiction stories and movies to describe spaceships or journeys through the cosmos.
Occurring between galaxies.
