Hypertext Webster Gateway: "jamming"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Jam \Jam\, v. t. [imp. & p. p. {Jammed}; p. pr. & vb. n.
{Jamming}.] [Either fr. jamb, as if squeezed between jambs,
or more likely from the same source as champ See {Champ}.]
1. To press into a close or tight position; to crowd; to
squeeze; to wedge in.
The . . . jammed in between two rocks. --De Foe.
2. To crush or bruise; as, to jam a finger in the crack of a
door. [Colloq.]
3. (Naut.) To bring (a vessel) so close to the wind that half
her upper sails are laid aback. --W. C. Russell.
From WordNet (r) 1.7 (wn)
jamming
n : deliberate radiation or reflection of electromagnetic energy
for the purpose of disrupting enemy use of electronic
devices or systems [syn: {electronic jamming}, {jam}]
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