Measurement? Assessment? Evaluation?

How often do we hear these words thrown around and no one has really defined them. I know it is symantics, but I use measurement as an objective test that has a finite score - summative. Assessment, to me, is formative so that teacher and student can work together to reach a place where the objectives can be met successfully. If a grade must assigned, then it is alway "pass." Evaluation is the process of assigning a grade using that widely accepted scale of A, B, C, D, or F based on evidence that has been gathered using formative and summative methods.