as in jam
a crowded mass (as of cars) that impedes or blocks movement
knowing that there was a big traffic jam-up ahead, we took the detour that the locals always use
Synonyms & Similar Words
Relevance
Example Sentences
Recent Examples of Synonyms for jam-up
jam
Noun
-
Grandma Syl’s flaky cream cheese pastry was shaped into tiny triangles framing sweet dollops of her homemade raspberry and apricot-pineapple jams.—
Betsy Andrews,
Saveur,
20 Feb. 2026 -
Their berries are great for smoothies, jams, and sauces.—
Anne Readel,
Better Homes & Gardens,
20 Feb. 2026
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Cite this Entry
“Jam-up.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/jam-up. Accessed 22 Feb. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
