from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The act or pastime of visiting sights of interest.
- adj. Used or engaged in sightseeing: a sightseeing bus; a sightseeing tour.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The practice of going out looking at things; tourism.
- v. Present participle of sightsee.
sight + seeing (Wiktionary)