rollover

Imagine your savings bond is about to end. Instead of taking the money out, you move it into a new bond so it can keep earning interest. That kind of move is called a "*rollover*."

This word is used most often in finance, especially for retirement accounts, loans, and investments that continue into a new period instead of ending. It can also appear in a very different setting: a *rollover* accident, where a vehicle tips onto its side or roof. In both cases, the idea is that something does not stay in its original position.

The word "rollover" has several meanings, but the most common ones are easier to follow if you start with the idea of something being carried forward or tipped over into a new position. It is used most often as a noun, especially in finance.

In financial English, a *rollover is the transfer of money or debt into a new account, investment, or period without closing the process completely. For example, someone might move money from a 401(k) into an IRA, or renew a short-term loan by pushing it into the next term. In this sense, a rollover* often means continuation, renewal, or reinvestment rather than cashing out or stopping.

The word is also common in transport and safety. A *rollover* accident happens when a vehicle flips onto its side or roof. This meaning is literal and physical, and it is especially common in news reports, safety guides, and insurance language.

You may also see the related verb form, *roll over, in sentences about turning over in bed, a dog turning over on command, or an agreement being continued. Those uses are connected, but the noun "rollover" itself is used much more often for finance and vehicle accidents. So, in most real situations, if you see "rollover*," think first of money being moved forward into something new or a vehicle turning onto its side or roof.