The meaning of MOISTURE is liquid diffused or condensed in relatively small quantity. How to use moisture in a sentence. Moisture definition: condensed or diffused liquid, especially water.. See examples of MOISTURE used in a sentence. Moisture is defined as the water content in the atmosphere, which can originate from various sources including transpiration from vegetation and evaporation from bodies of water such as the sea. AI generated definition based on: Forest Ecology and Management, 2009 1. objective Water content determination generally takes 16 to 24 hours by oven drying method. To quickly determine the water content at site, use of Rapid Moisture Meter is very advantageous. In this method, water content is determined from the gas pressure developed by the reaction of calcium carbide (Absorbent) with free water of the soil sample. From the calibrated scale of the pressure gauge, the percentage of water on total (wet) mass of soil sample is obtained and the same is ...