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jam

High
UK/dʒæm/US/dʒæm/

Common in everyday informal use; 'jam' (traffic, machinery) also common in technical/business contexts.

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Definition

Meaning

A thick, sweet spread made from cooked fruit and sugar.

To press or squeeze into a tight space; a difficult situation; a temporary stoppage of a mechanism or system; informal for a situation where many things are happening at once.

Linguistics

Semantic Notes

The word 'jam' covers distinct senses: 1. The food product, 2. The act of forcing something into place (verb), 3. A crowded situation or stoppage (noun). Context is crucial for disambiguation.

Dialectal Variation

British vs American Usage

Differences

In BrE, 'jam' refers primarily to the fruit spread (AmE 'jelly' is a different, clearer product). The traffic sense is common in both, but 'jam session' (music) is more AmE. 'Jam' as a verb (to make something stop working) is equally common.

Connotations

In BrE, 'jam' is strongly associated with breakfast/tea. In AmE, 'jelly' is more common for the spread, so 'jam' can feel slightly more specific or upscale. The 'difficult situation' sense ('in a jam') is slightly more informal AmE.

Frequency

The food sense is significantly more frequent in BrE. The 'traffic jam' sense is equally high frequency in both varieties. The verb sense (to force/stick) is common in both.

Vocabulary

Collocations

strong
traffic jamlog jamjam sandwichjam sessionin a jam
medium
strawberry jamjam jarjam tomorrowjam-packedpaper jam
weak
jam donutjam roly-polysignal jamjam on it

Grammar

Valency Patterns

jam something into somethingjam on something (the brakes)jam togetherbe jammed with somethingget jammed

Vocabulary

Synonyms

Strong

crushpackcramstuffblockage

Neutral

spreadpreservemarmaladecongestioncrowd

Weak

confiturehaltsnarl-uppredicament

Vocabulary

Antonyms

flowempty spaceclearanceeasemotion

Phrases

Idioms & Phrases

  • “in a jam (in trouble)”
  • “jam tomorrow (a never-fulfilled promise)”
  • “jam-packed (very crowded)”
  • “money for jam (easy profit)”

Usage

Context Usage

Business

Refers to bottlenecks in production or logistics (e.g., 'a jam in the supply chain').

Academic

Rare; may appear in socio-economic studies of traffic or in food science.

Everyday

Very common for food, traffic, and minor mechanical problems (e.g., printer jam).

Technical

Used in engineering for mechanical seizure and in telecommunications for signal jamming.

Examples

By Part of Speech

verb

British English

  • Don't jam all those clothes into one suitcase.
  • The printer has jammed again.
  • He jammed on the brakes to avoid the cat.

American English

  • We managed to jam eight people into the car.
  • The lock jammed because of the rust.
  • They'd jam the signal to prevent broadcasting.

adjective

British English

  • The train was absolutely jam-packed this morning.
  • We're in a bit of a jam situation with the deadline.

American English

  • The stadium was jam-packed for the finale.
  • It's a jam band, known for long improvisations.

Examples

By CEFR Level

A2
  • I like strawberry jam on my toast.
  • There was a big traffic jam today.
  • The drawer is jammed; I can't open it.
B1
  • Can you pass me the jam, please?
  • We got stuck in a jam for over an hour.
  • He jammed his finger in the door.
B2
  • The protests jammed the streets of the capital.
  • A paper jam brought the office printer to a halt.
  • They survived on bread and jam for a week.
C1
  • The sudden influx of orders jammed the company's fulfilment system.
  • Politicians are accused of offering only jam tomorrow to the electorate.
  • The musicians held an impromptu jam session after the gig.

Learning

Memory Aids

Mnemonic

Imagine a JAR so full of sweet fruit that you have to JAM the lid on.

Conceptual Metaphor

OBSTRUCTION IS A JAM (e.g., traffic jam, log jam, paper jam).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Do not confuse with Russian 'джем' which is only the food sense. The verb 'to jam' is not 'джемить' but 'застревать', 'заклинивать'. 'Traffic jam' is 'пробка', not 'дорожный джем'.

Common Mistakes

  • Using 'jam' for all fruit spreads (in AmE, jelly, preserves, jam are distinct). Confusing 'jam' (crowd/stoppage) with 'jamb' (door frame).

Practice

Quiz

Fill in the gap
Sorry I'm late; I was caught in a terrible traffic on the motorway.
Multiple Choice

In British English, which of these is the most likely meaning of 'jam' in isolation?

FAQ

Frequently Asked Questions

Jam contains crushed fruit, jelly is made from fruit juice (no pieces), and marmalade is a citrus-based jam with peel.

Yes, it's equally common. Synonyms include 'tailback' (BrE) and 'gridlock' (stronger, both).

Yes, informally it can mean 'something easy' ('This test is a jam') or, in music, an improvised session ('jam session').

It describes a pleasant thing that is often promised but never actually happens, from Lewis Carroll's 'Through the Looking-Glass'.