What is the strongest dollar right now?

I'm genuinely curious about something related to currencies, specifically the dollar. Could you please elaborate on what is meant by 'the strongest dollar right now'? Is it referring to a specific exchange rate, perhaps against another major currency like the euro or the yen? Or does it pertain to the overall strength and stability of the dollar globally? Given the constant fluctuations in currency markets, I'm keen to understand how this strength is measured and what factors contribute to it. Is it primarily based on economic indicators, political stability, or perhaps a combination of both? Your insights would be greatly appreciated.