Definition of dray. : a vehicle used to haul goods; especially : a strong cart or wagon without sides.
Expressions versus Equations. A difference between expressions and equations is what each represents. An expression shows a math relationship. One key to an expression is that there is no solution. An expression does not have an answer. An expression, however, can be evaluated. To evaluate an expression, substitute values for the variables.
Definition - What does Expression mean? An expression is a particular concept in computer science in which a number of variables or constants, and operators and functions, are put together in a single statement that is acted on by a particular programming language. In computer science, expressions are written by developers, interpreted by computers and 'evaluated.â.