Pronunciation: (in-es'tu-mu-bul), [key]
1. incapable of being estimated or assessed.
2. too large or great to be estimated or appreciated: The flood caused inestimable damage.
3. of incalculable value; valuable beyond measure; priceless: jewels of inestimable worth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.