Definitions for "Plastic limit"
The moisture content at which a soil changes from semisolid to plastic.
The water content dividing a soil in a plastic state from a soil in a semi-solid state.
The water content at which a soil will just begin to crumble when rolled into a thread approximately 1/8 of an inch in diameter. It is also the water content corresponding to an arbitrary limit between the plastic and semisolid states of consistency of a soil.