WordumMeaningaroundPart of speechprepositionPronunciationCourseGermanLessonThe conjunction since (seitdem)Usages of umEr reist um die Welt, seitdem er in Rente ist.He has been traveling the world ever since he retired.Seitdem sie sich kennengelernt haben, reisen sie um die Welt.Ever since they met, they have been traveling the world.