soft
1. Dialect drizzly or rainy
2. (of a diet) consisting of easily digestible foods
3. Chem (of water) relatively free of mineral salts and therefore easily able to make soap lather
4. (of a drug such as cannabis) nonaddictive or only mildly addictive
5. (of a currency) in relatively little demand, esp because of a weak balance of payments situation
6. (of radiation, such as X-rays and ultraviolet radiation) having low energy and not capable of deep penetration of materials
7. Physics (of valves or tubes) only partially evacuated
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005