backlog

noun

1. A large log to burn at the back of a fire.

   “While she was preparing my breakfast, I chopped off a backlog and put it on the fire,[…]”

   “He threw it on the fire for a back-log, first scraping the live coals and ashes to a heap for his damper.”

2. A reserve source or supply.
3. An accumulation or buildup, especially of unfilled orders, unconsumed products or unfinished work.

   “He went to work on Saturday to try to work through the backlog of papers on his desk.”

   “Kyle purchased a new one despite having a backlog of video games that he hasn't played.”

   “With much of the building unrenovated since it was built in the 19th century, there is a significant backlog of repairs estimated to be in excess of £1bn.”

4. A log containing text previously read, as in text-based video games or chat rooms.

verb

1. (ambitransitive)To acquire something as a backlog, or to become a backlog