das Wintersemester
winter semester
The study period at colleges and universities that usually lasts from October to March.
Ich habe mich für zwei neue Kurse im Wintersemester eingeschrieben.
I enrolled in two new courses for the winter semester.

winter semester
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winter semester
The study period at colleges and universities that usually lasts from October to March.
Ich habe mich für zwei neue Kurse im Wintersemester eingeschrieben.
I enrolled in two new courses for the winter semester.

The word is a simple compound of 'der Winter' (winter) and 'das Semester' (semester). So it literally refers to the study period that mainly falls in winter.
Das Wintersemester ist oft kälter und dunkler als das Sommersemester.
The winter semester is often colder and darker than the summer semester.
This term is used almost exclusively in the context of universities and colleges in German-speaking countries. It describes the first half of the academic year.
Die Vorlesungen im Wintersemester beginnen meistens im Oktober.
Lectures in the winter semester usually begin in October.
Common phrases are 'sich für das Wintersemester einschreiben' (to enroll for the winter semester), or 'immatrikulieren' (to matriculate), 'im Wintersemester anfangen zu studieren' (to start studying in the winter semester), or 'Kurse im Wintersemester belegen' (to take courses in the winter semester).
Für das kommende Wintersemester haben sich tausende neue Studierende beworben.
Thousands of new students have applied for the coming winter semester.
In everyday university life, in course catalogs, or on websites, the abbreviation 'WiSe' or 'WS' is often used.
Die Prüfung findet am Ende des WiSe 24/25 statt.
The exam takes place at the end of WiSe 24/25.
semester
'Semester' and 'Wintersemester' both belong to scheduling at colleges and universities. 'Semester' is the general term for a half-year period of study. 'Wintersemester' is more specific: it means the semester that usually begins in autumn and continues into spring. The words can be confused because every winter semester is a semester. But not every semester is a winter semester; there is also the summer semester. If the season or the exact study period is important, use 'Wintersemester'.

Im Wintersemester lernt Mehmet besonders viel für seine Prüfungen.
In the winter semester, Mehmet studies especially hard for his exams.
Dieses Semester hat Yara nur an drei Tagen pro Woche Vorlesungen.
This semester, Yara has lectures on only three days a week.