Definition of semester
1
: either of the two usually 18-week periods of instruction into which an academic year is often divided
2
: a period of six months
Test Your Vocabulary
Which Word Does Not Belong?
-
- Which of these words does not mean "nonsense"?

Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share semester
Time Traveler for semester
The first known use of semester was in 1827
See more words from the same year