IPA: /mɛrɪˈdɪənəli/
KK: /mɛrɪˈdɪənəli/
In a way that relates to or is directed towards a meridian, which is an imaginary line that runs from the North Pole to the South Pole.
The river flows meridionally across the landscape, creating a natural boundary.
Meridionally → It is formed from "meridies" (meaning midday or south) and the suffix "-ally" (meaning in a manner relating to). The word "meridionally" refers to something that is related to or situated in the south or towards the midday position.
Think of 'midday' or 'south' ('meridies') to remember that 'meridionally' means in a manner related to the south.