I. ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: back (III) + log
1. : a large log of wood forming the back of a campfire or hearthfire
2. : a reserve that promises continuing work and profit
a vast backlog of orders may soon make possible the greatest peacetime industrial activity that we have ever seen — H.S.Truman
3. : an increasing accumulation of tasks unperformed or materials not processed
eliminate the backlog of uncataloged books
judges met … to discuss how to clear the backlog of 15,000 cases — New York Times
II. verb
: to accumulate as a backlog