What does this mean please?

In my Ford Focus owner's manual it says "Oil expands when it is hot. The level may therefore extend a few millimetres beyond the MAX mark."

If I were to check the oil 10 or 15 minutes after turning the engine off, would the oil still be "hot" and hence have expanded a few millimetres above the max mark? Or does this only apply if I were to check the oil level immediately after turning the engine off? In other words after 10 or 15 minutes would the engine have cooled enough for the expansion to not apply?

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