Search for the definition you are looking for.
A graph of the term structure of interest rates. It is usually given in terms of the spot yields on bonds with different maturities but the same risk factors (such as creditworthiness of issuer), plotted against maturity. In general, yields will increase with maturity and with the riskiness of the debt. Yield curves can be plotted for default-free bonds. Bonds that may default will fall on another yield curve at some spread to the default-free curve.