About #57 Gravel Stone (P2). #57 Stone is an aggregate that is processed from natural durable materials. The size of #57 Stone spands from very small to 1 inch. #57 Stone is commonly used in mix concrete, mix asphalt and as bases for retaining walls and driveways.#57 Stone can also be applied in irrigation and on gravel roads.57 Stone is an aggregate that is processed from natural durable materials. The size of #57 Stone spands from very small to 1 inch. #57 Stone is commonly used in mix concrete, mix asphalt and as bases for retaining walls and driveways.
Freebase (0.00 / 0 votes) Rate this definition: Del. Del, or Nabla, is an operator used in mathematics, in particular, in vector calculus, as a vector differential operator, usually represented by the nabla symbol â. When applied to a function defined on a one-dimensional domain, it denotes its standard derivative as defined in calculus.
Definition of DL. 1  DL is short for down-low, which basically means to keep things under-wraps, to keep a secret or lay low. 2  I'll tell you this, but, you gotta promise to keep it on the DL. D.L. means down low. it means that something is not known to all. if you keep something on the D.L... 2  you don't share it with others. 3  I don't want my Dad to find out, so keep it on the D.L. 4  She like me but keep that on the DL.