Definition of "accumulate"

(transitive) To heap up in a mass; to pile up; to collect or bring together (either literally or figuratively)  examples

(intransitive) To gradually grow or increase in quantity or number.  quotations  examples

(education, dated) To take a higher degree at the same time with a lower degree, or at a shorter interval than usual.  examples

(poetic, rare) Collected; accumulated.