ジャイアMeanings1noungyre; atmospheric or oceanic vortexmeteorologyTechnical term in meteorology and oceanography for a large-scale circular current or vortex.北きた太たい平へい洋ようのジャイアは海かい洋よう循じゅん環かんの重じゅう要ような要よう素そだ。The North Pacific gyre is an important element of ocean circulation.