from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Ebullient vitality and energy. See Synonyms at vigor.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Ready vitality and vigor.
from the GNU version of the Collaborative International Dictionary of English
- n. Power; force; energy; spirit; activity; vigor.
from The Century Dictionary and Cyclopedia
- n. Vigor; energy; activity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a healthy capacity for vigorous activity
- n. an imaginative lively style (especially style of writing)
Latin, accusative of vīs; see weiə- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
1843, possibly from the Latin vim, accusative of vis ("power, energy") (from which English vis); perhaps a modern imitative of the Latin. (Wiktionary)