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in the PONS Dictionary

jam1 [dʒæm] N

jam

I. jam2 [dʒæm] N

1. jam inf (awkward situation):

jam
to be in a jam

2. jam no pl (crowd):

jam
jam AUTO

3. jam (in machine):

jam

4. jam MUS:

jam

II. jam2 <-mm-> [dʒæm] VB trans

1. jam (cause to become stuck):

jam machine, mechanism
jam machine, mechanism
to jam sth open

2. jam (cram):

to jam sth into sth

3. jam radio:

jam
jam

III. jam2 <-mm-> [dʒæm] VB intr

1. jam (become stuck):

jam photocopier
jam photocopier

2. jam (play music):

jam jar N

jam jar

jam-packed [ˌdʒæmˈpækt] ADJ inf

jam-packed
jam-packed

paper jam N

paper jam

traffic jam N

Present
Ijam
youjam
he/she/itjams
wejam
youjam
theyjam
Past
Ijammed
youjammed
he/she/itjammed
wejammed
youjammed
theyjammed
Present Perfect
Ihavejammed
youhavejammed
he/she/ithasjammed
wehavejammed
youhavejammed
theyhavejammed
Past Perfect
Ihadjammed
youhadjammed
he/she/ithadjammed
wehadjammed
youhadjammed
theyhadjammed