rainy Syllabification: (rain·y)Pronunciation: /ˈrānē/Translate rainy | into French | into German | into Italian | into Spanish Definition of rainy adjective (rainier, rainiest) (of weather, a period of time, or an area) having a great deal of rainfall:a rainy afternoonPhrases a rainy day used in reference to a possible time in the future when something, especially money, will be needed:invest and save for a rainy dayDerivatives raininess noun Origin: Old English rēnig (see rain, -y1)rainy in other Oxford dictionaries Definition of rainy in the British & World English dictionary