Waterlogging is a verbal noun meaning the saturation of such as ground or the filling of such as a boat with water.

Ground may be regarded as waterlogged when the water table of the ground water is too high to conveniently permit an anticipated activity. After heavy rain, it may prevent the playing of cricket or other outdoor sports.

In agriculture, various crops require the presence of air (specifically, Oxygen) to a greater or lesser depth in the soil. Waterlogging of the soil prevents the ingress of air. Thus, the dimensional definition of waterlogging will vary according to the purpose in view. The crop's demand for freedom from waterlogging may vary between seasons of the year, as with the growing of rice (Oryza sativa).

In archaeology, the long-term exclusion of air by the presence of the groundwater has the effect of preserving perishable artefacts. Thus, in a site which has been waterlogged since the archaeological horizon was deposited, exceptional insight may be obtained by study of artefacts of leather, wood, textile or similar materials.