cumulate

US: (v. kyo̅o̅′myə lāt′; adj. kyo̅o̅′myə lit, -lāt′)

Inflections of 'cumulate' (v): (⇒ conjugate)

cumulates

v 3rd person singular

cumulating

v pres p

cumulated

v past

cumulated

v past p

WordReference Random House Unabridged Dictionary of American English © 2026

cu•mu•late  (v. kyo̅o̅′myə lāt′;adj. kyo̅o̅′myə lit, -lāt′), v., -lat•ed, -lat•ing, adj. 
v.t. 

1. to heap up;
   amass;
   accumulate.

adj. 

2. heaped up.

• Latin cumulātus (past participle of cumulāre to heap up, pile up, accumulate), equivalent. to cumul(us) a heap, pile, mass, cumulus + -ātus -ate¹
• 1525–35

cu′mu•late•ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

cumulate verb / ˈkjuːmjʊˌleɪt/

1. to accumulate
2. (transitive) to combine (two or more sequences) into one

adjective / ˈkjuːmjʊlɪt -ˌleɪt/

1. heaped up

Etymology: 16th Century: from Latin cumulāre from cumulus heap

ˌcumuˈlation noun