Word.ws English Dictionary

jam up

jam up verb: to cause (something) to become blocked or clogged; to clog up.

Verb

jam up (third-person singular simple present jams up, present participle jamming up, simple past and past participle jammed up)

  1. (transitive) To cause (something) to become blocked or clogged; to clog up.
  2. (intransitive) To become blocked or clogged.
    • The traffic jammed up on the boulevard.
  3. (figuratively, transitive) To cause trouble; to stop or inhibit (someone, something).

Forms of jam up

third-person singular presentjams up
present participlejamming up
past participlejammed up
pastjammed up

Words formed from jam up

Questions about jam up

What does jam up mean?
Jam up means to cause (something) to become blocked or clogged; to clog up.
What part of speech is jam up?
Jam up is a verb.
What is the past tense of jam up?
The past tense of jam up is jammed up.

Words near jam up in the dictionary

  1. jam sessions
  2. jam tart
  3. jam tarts
  4. jam today
  5. jam tomorrow
  6. jam up
  7. jam-jar
  8. jam-jar glasses
  9. jam-jars
  10. jam-pack
  11. jam-packed

Source and license

Adapted from Wiktionary: jam up (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “jam up.” Word.ws, https://word.ws/jam_up. Based on Wiktionary, CC BY-SA 4.0.