No.
At a very basic level, impermanent loss is the difference in value between the combined amount of assets someone places into a liquidity pool – at any given time, versus the value of those same assets if just HODLed – at the same time. To be clear, this is a very crude definition that glosses over a lot of detail. However @andrey has a very nice detailed explainer posted on this very forum.
What you are describing is called slippage. Slippage is the difference in the expected cost of a trade and the executed cost of a trade due to factors such as volatility, liquidity and asset momentum.