aggregate
adjective
formed by the conjunction or collection of particulars into a whole mass or sum; total; combined.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
This invasion subsequently allows the horde of zombies—which had been aggregating outside—free range of the place.
From Slate ● Oct. 30, 2014