backlog noun
ADJ. big, considerable, enormous, huge, large
VERB + BACKLOG be faced with, have We are faced with a backlog of orders we can't deal with. | catch up on, clear, deal with, reduce
BACKLOG + VERB accumulate, build up A huge backlog of work had built up.
You can also check other dicts: backlog (English, 中文解释 ), wordnet sense, Collins Definition