backlog
noun(back-log)
something kept back or saved for future use or a special purpose
backlog
verb(back-log)
accumulate and create a backlog
backlog
noun(back-log)
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)
backlog
noun(back-log)
the large log at the back of a hearth fire