IPA: /səˈmɛstə/
KK: /səˈmɛstər/
A half-year term in a school or university, usually lasting for about 15 to 18 weeks.
I have to register for my classes before the semester starts.
Semester → It is formed from "semestris" (from Latin, meaning of six months) and the suffix "-er" (indicating a period or duration). The word "semester" refers to a period of six months, typically used in academic contexts to denote a term in school or university.
Think of a six-month period ('semestris') when you remember that a semester is a term lasting six months.