In cooking, the process of increasing the viscosity of a liquid either by reduction, or by the addition of a thickening agent, typically containing starch.
accumulating and becoming more intense; "the deepening gloom"; "felt a deepening love"; "the gathering darkness"; "the thickening dusk"
becoming more intricate or complex; "a thickening plot"
the act of thickening
any material used to thicken; "starch is used in cooking as a thickening"
