Main Entry:

¹jam

Pronunciation:

\ˈjam\

Function:

verb

Inflected Form(s):

jammed; jam·ming

Etymology:

origin unknown

Date:

1706

intransitive verb1 a: to become blocked or wedged b: to become unworkable through the jamming of a movable part2: to force one's way into a restricted space3: to take part in a jam session4: dunk 2transitive verb1 a: to press into a close or tight position <jam his hat on> b (1): to cause to become wedged so as to be unworkable <jam the typewriter keys> (2): to make unworkable by jamming c: to block passage of : obstruct d: to fill often to excess : pack <the crowd jammed the theater>2: to push forcibly ; especially : to apply (brakes) suddenly and forcibly —used with on3: crush, bruise4 a: to make unintelligible by sending out interfering signals or messages b: to make (as a radar apparatus) ineffective by jamming signals or by causing reflection of radar waves5: to block, crowd, or bump (a pass receiver) near the line of scrimmage in football6: to pitch inside to (a batter)

— jam·mer \ˈja-mər\ noun