from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The science or knowledge of the stars, especially the fixed stars.
from the GNU version of the Collaborative International Dictionary of English
- n. The science or knowledge of the stars, esp. the fixed stars.
from The Century Dictionary and Cyclopedia
- n. Knowledge of the stars, especially of the fixed stars, in respect to their names, magnitudes, situations, etc.
astro- + Ancient Greek knowledge. (Wiktionary)