[mass noun](Physics)a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system(Symbol: S) (物理)熵(符号:S) ■(figurative)lack of order or predictability; gradual decline into disorder (喻)无序状态,无法预见;渐降为无秩序状态 a marketplace where entropy reigns supreme. 极其混乱的市场。 ■(in information theory) a logarithmic measure of the rate of transfer of information in a particular message or language (信息论)熵,平均信息量