1
- of or in the south; southern（在）南部的, （在）南方的：
the meridional leg of the journey.
旅途中南方一程。
1.1
- relating to or characteristic of the inhabitants of southern Europe, especially the South of France南欧（尤指法国南部）人的; 南欧人特有的：
she was meridional in temperament.
她有南欧人的性格。
2
- of or relating to a meridian（与）子午线（有关）的：
the meridional line of demarcation.
子午分界线。
2.1
- Meteorology (chiefly of winds and air flow) aligned with lines of longitude【气象】（尤指风、气流）沿经线的, 经向的, 南北方向的。
- a native or inhabitant of the south, especially the south of France南方（尤指法国南部）人, 南方居民。
词源
late Middle English: via Old French from late Latin meridionalis, formed irregularly from Latin meridies 'midday, south'.