Definition of apparent horizon
: the somewhat irregular boundary between the sky and the land or water surface of the earth as viewed from any given point
— called also visible horizon
Test Your Vocabulary
Name That Food
-
- Name these cookies!

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share apparent horizon