from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A condition of bodily strength, vigor, or vitality.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. strength, vigour or vitality
from The Century Dictionary and Cyclopedia
- n. In pathology, strength; excessive force: opposed to asthenia or debility.
New Latin, from Greek sthenos, strength; see segh- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)