appreciationap·pre·ci·a·tion /əˌpriːʃiˈeɪʃən/ noun [uncountableU]1FINANCEan increase in the value of somethingThere has been a sharp appreciation in the share prices of US companies.
→ capital appreciation2FINANCE an increase in the value of one currency compared to other currenciesHe estimated that currency appreciation cost the company £700,000 last year.
appreciation againstthe appreciation of sterling against the dollar