average bond

from The Century Dictionary.

• noun See bond.
• noun Synonyms and Medium, etc. See mean, n.
• Equal in amount to the sum of all the particular quantities of the same sort divided by the number of them: as, the average yield of wheat to the acre; the average price of anything for a year.
• Hence—2. Of medium character, quality, etc.; midway between extremes; ordinary.
• Estimated in accordance with the rules of average: as, the loss was made good by an average contribution.
• Synonyms See mean, n.