verb (used with object), jammed, jam·ming.
- to interfere with (radio signals or the like) by sending out other signals of approximately the same frequency.
- (of radio signals or the like) to interfere with (other signals).
verb (used without object), jammed, jam·ming.
Origin of jam1
Origin of jam2
Examples from the Web for jam
Most Cacophony events were one-off affairs, just enough to jam the culture a bit before moving on.Before the Bros, SantaCon Was as an Anti-Corporate Protest|David Freedlander|December 12, 2014|DAILY BEAST
The rears of planes are becoming hell with smaller, harder seats to jam as many passengers in as possible.Flying Coach Is the New Hell: How Airlines Engineer You Out of Room|Clive Irving|November 25, 2014|DAILY BEAST
Jam is there because of the sudden death of her boyfriend, Reeve, and the listless state of major depression it throws her into.The Thrilling, Traumatic Lives of Teens: The Fall’s Best YA Fiction|Hugh Ryan|November 8, 2014|DAILY BEAST
Mumford Sons, “Hopeless Wanderer” That one time Jason Bateman, Ed Helms, Will Forte, and Jason Sudeikis had a jam session.Andrew Garfield in ‘We Exist’ and More Celebrities in Music Videos|Marina Watts|May 18, 2014|DAILY BEAST
Personally, I'm waiting for the first scones, jam, and clotted cream fight.
Nooses were dropped over the upright ends of the logs at the foot of the jam, and the whole gang was set to pull on them.
When the jam is cooked to the proper consistency, the juice should test as for jelly.Woman's Institute Library of Cookery, Vol. 5|Woman's Institute of Domestic Arts and Sciences
This prejudice is absolutely baseless, and enormous quantities of beet-sugar are used in the boiling of jam.
Apricots are principally eaten as gathered; but are also dried, candied, and made into jam.
In the case of trays of boiling fruit, jam, etc., it may lead to horrible accidents.Women in Modern Industry|B. L. Hutchins
verb jams, jamming or jammed
Word Origin for jam
Word Origin for jam
"to press tightly," also "to become wedged," 1706, of unknown origin, perhaps a variant of champ (v.). Of a malfunction in the moving parts of machinery, by 1851. Sense of "cause interference in radio signals" is from 1914. Related: Jammed; jamming. The adverb is recorded from 1825, from the verb.
"fruit preserve," 1730s, probably a special use of jam (v.) with a sense of "crush fruit into a preserve."
"a tight pressing between two surfaces," 1806, from jam (v.). Jazz meaning "short, free improvised passage performed by the whole band" dates from 1929, and yielded jam session (1933); but this is perhaps from jam (n.1) in sense of "something sweet, something excellent." Sense of "machine blockage" is from 1890, which probably led to the colloquial meaning "predicament, tight spot," first recorded 1914.
see under get in a bind.