backlog
B2 (Common in business and workplace contexts)Neutral to formal, common in professional and technical contexts.
Definition
Meaning
A large number or pile of tasks, items, or work that should have been done or processed earlier and is now waiting to be dealt with.
An accumulation or reserve of something, especially work that has built up due to delays or insufficient processing capacity, often implying a need for catch-up effort.
Linguistics
Semantic Notes
The term inherently suggests delay or accumulation over time. It is typically used for work, tasks, orders, or administrative items, not for physical objects like rubbish. It is a count noun (a backlog, backlogs).
Dialectal Variation
British vs American Usage
Differences
Usage is virtually identical in both varieties. Minor potential differences exist in collocational preferences of related verbs (e.g., 'clear a backlog' is slightly more common in UK English, while 'work through a backlog' is equally common in US English).
Connotations
Neutral/negative, implying inefficiency, under-resourcing, or unexpected demand. It is a standard term in project management and business with no significant connotative difference.
Frequency
Slightly more frequent in American business English, but a core, common term in both.
Vocabulary
Collocations
Grammar
Valency Patterns
backlog of + [PLURAL NOUN: tasks, orders, cases, emails, applications]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “A log at the back of the fire (historical origin, not a modern idiom).”
Usage
Context Usage
Business
Refers to unfulfilled orders, pending customer service requests, or unprocessed invoices.
Academic
Used for unpublished research, pending peer reviews, or ungraded student assignments.
Everyday
Common for emails, household chores, or TV shows one hasn't watched yet.
Technical
In software/agile development, a prioritized list of tasks or features for a product.
Examples
By Part of Speech
verb
British English
- The team are backlogging the less urgent support tickets.
- Applications began to backlog during the website outage.
American English
- The system backlogs orders if payment is pending.
- We risk backlogging critical maintenance requests.
adjective
British English
- The backlogged paperwork required a week to clear. (less common)
- They addressed the backlogged cases first.
American English
- Backlogged orders are shipped within 30 days.
- The backlogged data was finally processed.
Examples
By CEFR Level
- I have a backlog of emails to answer.
- There is a backlog of work after the holiday.
- The hospital is trying to reduce the backlog of operations.
- We need to clear the backlog of orders from last week.
- The strike caused a significant backlog in passport applications.
- The development team prioritises features from the product backlog.
- Despite hiring temporary staff, the administrative backlog proved insurmountable.
- The consultancy was brought in to analyse the causes of the perennial backlog in the complaints department.
Learning
Memory Aids
Mnemonic
Imagine a LOG jammed at the BACK of a river, stopping all the other logs (tasks) from moving forward.
Conceptual Metaphor
WORK IS A MOVING OBJECT (a backlog is an obstacle that stops the flow). TASKS ARE PHYSICAL OBJECTS (that pile up).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'задний журнал' or 'бэклог'. Use 'невыполненные задания', 'накопившиеся дела', 'очередь неотложных дел', 'неразобранные заказы'. In IT, 'бэклог' is a accepted loanword.
Common Mistakes
- Using it as a non-count noun (e.g., 'We have backlog'). Correct: 'We have a backlog.'
- Confusing with 'backorder' (a specific unfulfilled order).
- Using for positive reserves: 'a backlog of savings' is atypical.
Practice
Quiz
In Agile project management, what is a 'product backlog' primarily used for?
FAQ
Frequently Asked Questions
Generally negative or neutral, as it implies a delay or accumulation of work that needs catching up. However, in contexts like 'a backlog of demand', it can imply healthy interest.
Yes, but it is less common and slightly informal/jargonistic (e.g., 'Requests are backlogged during the night'). The noun form is standard.
'Inventory' is a neutral term for stock on hand. A 'backlog' specifically refers to unfulfilled commitments (orders, tasks) that are overdue or delayed, often causing a queue.
Common phrases: 'clearing a backlog', 'working through a backlog', 'reducing the backlog', 'addressing the backlog'.