- as compared with the corresponding figure 12 months earlier; involving or reckoned by such a comparison: Exports fell 2 percent year over year in May.February rents for one-bedroom apartments saw a year-over-year increase of 6 percent.Abbreviation: YoY
- in each year that passes after an initial investment, the start of an observed trend, etc.; annual or annually: The gain from this software purchase has been our best ROI year over year.Over the last decade, the year-over-year trend in inflation has strongly correlated with the year-over-year trend in GDP.
