Line Where the Earth Meets the Sky
This page is the CodyCross answer for the clue below from Airport, Group 450, Puzzle 4 (Military Air Base).
Question is: Line Where the Earth Meets the Sky
and the answer is: HORIZON
Word Meaning:
HORIZON — The visible horizontal line (in all directions) where the sky appears to meet the earth in the distance.
Definitions from Wiktionary.