jam → uncountable
Meaning: sweet food that's made from fruit and usually spread on bread or toast
Example sentence: Would you like some strawberry jam with your toast, madam?
jam → countable
Meaning: many vehicles stuck together in traffic, or a difficult situation
Example sentence: Brad said he was late because he was caught in a traffic jam.
In which sentence is the word "jam" countable?
Contributor: Matt Errey