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jam up - definition and synonyms

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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

phrasal verb [intransitive/transitive]
Word Forms
present tense
I/you/we/theyjam up
he/she/itjams up
present participlejamming up
past tensejammed up
past participlejammed up
Related words
  1. same as jam

    A crumpled sheet had jammed up the whole photocopier.

See also main entry: jam

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