- A tendon. (noun)
- Vigorous strength; muscular power. (noun)
- The source or mainstay of vitality and strength. Often used in the plural: "Good company and good discourse are the very sinews of virtue” ( Izaak Walton). (noun)
- To strengthen with or as if with sinews. (verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.