congestion

congestion — noun

1. the situation where a place has so many people, vehicles, or objects packed into

1.nounB2
Definition

the situation where a place has so many people, vehicles, or objects packed into it that moving around or using the space becomes hard.

Example

Parents waiting at the school gates create heavy congestion every afternoon at pickup time.

congestion + at [place]

Mayor Imran promised to ease congestion in the old market district by widening the lanes.

ease + congestion

Common collocations
  • overcrowding and congestion
  • ease the congestion
  • visitor congestion
Synonyms
  • overcrowding

    near-synonym; emphasises too many people specifically

  • crowding

    more neutral; does not always imply difficulty

Antonyms

Grammar Patterns

congestion in [place]

congestion at [place]

Usage Note

Always uncountable; never 'a congestion' or 'congestions'. Refers to the crowded state itself, not the people or objects causing it.

Common Mistakes

There were many congestions at the festival.
There was a lot of congestion at the festival.
congestion is uncountable; use 'a lot of' or 'much'.

2. the state of roads being so full of cars, buses, and lorries that they barely mo

2.nounB2
Definition

the state of roads being so full of cars, buses, and lorries that they barely move, slowing every journey.

Example

Heavy congestion on the M25 added ninety minutes to Yael's drive home from the airport.

heavy + congestion + on [road]

London introduced a charge to reduce congestion in the city centre during weekday mornings.

reduce + congestion

Common collocations
  • traffic congestion
  • rush-hour congestion
  • ease traffic congestion
  • congestion charge
Synonyms
  • gridlock

    stronger; suggests vehicles are completely stuck

  • traffic jam

    countable; refers to one specific blockage rather than the general state

  • tailback

    British; the queue of stopped vehicles itself

Antonyms

Grammar Patterns

traffic congestion

congestion on [road]

Usage Note

Most common sense in news and urban planning contexts. Often modified by 'traffic', 'rush-hour', or 'heavy'. Distinguish from sense 1: sense 2 is specifically about vehicles on roads, not people in places.

Common Mistakes

I was late because of a congestion.
I was late because of the congestion.' or '...because of a traffic jam.
congestion is uncountable; for a single event use 'traffic jam'.

3. a stuffed feeling in the nose, caused by the lining swelling up so air cannot pa

3.nounB2
Definition

a stuffed feeling in the nose, caused by the lining swelling up so air cannot pass through easily — typical of colds, flu, or allergies.

Example

Owen woke with such bad nasal congestion that he could only breathe through his mouth.

nasal + congestion

The pharmacist gave Niamh menthol drops and a steam inhaler to relieve her congestion before bedtime.

relieve + congestion

Common collocations
  • nasal congestion
  • sinus congestion
  • relieve congestion
  • clear congestion
Synonyms
  • stuffiness

    more informal; common in everyday speech rather than medical labels

  • blockage

    general; can apply to any passage, not specifically the nose

Grammar Patterns

nasal congestion

congestion in [body part]

Usage Note

Frequently appears as the fixed phrase 'nasal congestion' on medicine packaging. The noun stays uncountable even when the cause is plural ('the congestion from his allergies', not 'the congestions').

Common Mistakes

I have congestions in my nose.
I have congestion in my nose.' or 'My nose is blocked.
uncountable; no plural form.

4. a medical condition where extra blood or fluid builds up inside an organ such as

4.nounC1
Definition

a medical condition where extra blood or fluid builds up inside an organ such as the lungs or liver, making it heavy and unable to work normally.

Example

Pulmonary congestion was visible on the chest scan, suggesting the patient's heart was struggling.

pulmonary + congestion

Dr. Léa explained that liver congestion develops when blood backs up from a weakened heart.

[organ] + congestion + can develop

Common collocations
  • pulmonary congestion
  • lung congestion
  • liver congestion
  • venous congestion
Synonyms
  • oedema

    British spelling; often interchangeable in heart-failure contexts

  • edema

    American spelling of the same condition

Grammar Patterns

congestion of [organ]

[organ] congestion

Usage Note

Used in clinical and veterinary writing; everyday speakers normally say 'fluid on the lungs'. Distinguish from sense 3: sense 3 is about the nose during a cold, while sense 4 refers to fluid pooling deep inside an internal organ.

Common Mistakes

The doctor said her lungs had a congestion.
The doctor said her lungs had congestion.' or '...had fluid on them.
uncountable; drop the article.

Word family

  • congest
    verbC1
  • congested
    adjectiveB2
  • decongestant
    nounC1
  • decongest
    verbC1

Synonym discussion

Sense: noun/2

All four words describe vehicles that are not moving freely, but they differ in scope and feel. 'Congestion' is the broadest and most formal — an uncountable noun used by city planners and news reports to describe an ongoing condition of slow-moving traffic across an area. 'Traffic jam' is countable and everyday: one specific blockage at one place and time, such as the jam on Friday night at exit 12. 'Gridlock' is stronger again, suggesting vehicles are so locked together that nothing can move in any direction, often during a major event. 'Tailback' is British and refers to the visible queue of stopped cars stretching backwards from the obstruction. So a journalist writes 'rush-hour congestion costs the city millions', but a commuter complains 'I sat in a tailback for an hour'.

congestion ↗gridlocktraffic jamtailback

Common collocations

Nouns

  • traffic congestion
  • nasal congestion
  • sinus congestion
  • lung congestion
  • congestion charge

Adverbs

Phrases

  • ease congestion
  • reduce congestion
  • relieve congestion
  • cause congestion
  • cut congestion

Prepositions

  • congestion in
  • congestion on
  • congestion at
  • congestion around

Etymology

LatinOld FrenchMiddle EnglishEnglish

Borrowed in the late 1300s from Latin 'congestio', a noun built from 'congerere' meaning to bring or heap things together (com- 'together' + gerere 'to carry'). Originally used in English medicine for an unhealthy build-up of blood inside the body, the word later spread by metaphor to crowded streets and city traffic in the nineteenth century, as horse-drawn carriages began to clog growing urban centres.