Definitions for "Liquid Limit"
The water content corresponding to the arbitrary limit between the liquid and plastic states of consistency of a soil. It is also the water content at which a pat of soil, cut by a groove of standard dimensions, will flow together for a distance of 1/2 inch under the impact of 25 blows of a standard liquid limit device.
The water content at which the minus #40 size fraction passes from a plastic to a liquid state.
the liquid limit is a measure of how much moisture a clay soil can take on before the soil behaves like a liquid; the liquid limit is determined by standard geotechnical engineering tests performed in a laboratory; the valve determined should be understood as an approximation since the engineer must make a subjective judgment as to at what point the clay soil behaves like a liquid