backlog
back·log
noun
1.
an accumulation of jobs not done or materials not processed that are yet to be dealt with (especially unfilled customer orders for products or services)
verb
1.
accumulate and create a backlog
Origin
From back + log. 1680s; originally a large log at the back of a fire. Figurative sense from 1880s, meaning "something stored up for later use". Possibly influenced by logbook as well.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.