Other price risk is the risk that the fair value or future cash flows of a financial instrument will fluctuate because of changes in market prices (other than those arising from interest rate risk or currency risk), whether those changes are caused by factors specific to the individual financial instrument or its issuer, or factors affecting all similar financial instruments traded in the market.
Other price risk is specifically discussed in IFRS 7 Financial Instruments: Disclosures.
Source: Glossary of Terms of IFRSs as at 31 December 2008.