north-south
Word family
Synonym discussion
Sense: adjective/1
While north‑south is the everyday adjective for describing a route, axis, or relationship between northern and southern points, meridional is a technical term mostly seen in cartography and formal geography (e.g., 'meridional flow' in meteorology). Longitudinal overlaps with north‑south in the directional sense but also means 'lengthwise' in any context (e.g., 'longitudinal study' has nothing to do with north and south). The antonym east‑west contrasts orientation only — it does not carry the geopolitical weight that north‑south does in phrases like 'the north‑south divide'. For everyday use, north‑south is the natural choice; reserve meridional for specialist writing.
Common collocations
Etymology
A compound of the cardinal directions north (from Old English norþ) and south (from Old English sūþ). The pairing north–south has been used since at least the 14th century in navigation and geography to describe a line, route, or axis extending between the two poles. Its modern geopolitical sense — referring to the economic and social gap between wealthy northern countries and poorer southern countries — became common in the mid‑20th century.