Climate: noun, [from Old French - climat; from Latin - clima, -atis; from Greek - klima, -atos, slope, supposed slope of the Earth, region, from klinein - to slope]. 1. Average condition of the weather at a place, over a period of years, as shown by temperature, wind velocity, rains, etc. 2. The trend of fundamental concepts and attitudes pervading a community,nation, or era; as 'intellectual climate'. - climatic = adjective.