Apparate is to travel to a location magically. It often causes a pop, or a loud cracking sound and could cause spliching if done incorrectly.
/a pər āt/
The Department of Magical Transportation requires a license for wizards to apparate, which, to obtain a wizard must have reached the age of 17 and pass the Apparition test without spliching. Other creatures are also able to apparate, including house elves and phoenixes, these creatures are also able to apparate places where a wizard would be blocked from doing so due to Anti-Apparition and Anti-Disapparition jinxes.
From the Latin, “Appareo,” meaning “appear.”