noun.

(a) Low-level software that is not usually changed. Firmware is now often stored in EEPROM or Flash memory, so it can be erased and updated.

(b) Historically, software that was stored in read-only chips. Since it could not be changed without a hardware change, it was called firmware.

(c) Commonly used to describe any software on a handheld device.
The firmware in my handheld is corrupted, and now it won't even boot.
by lanteigne October 12, 2005
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1. Software contained in a read-only memory (ROM) device. 2. <i> geek-speak </i> The personality traits that are a little bit difficult to change (requiring brainwashing, hypnosis, or the companionship of a woman).
My cellphone needed a firmware upgrade for my girlfriend to be able to break through my call-waiting whenever she wanted.
by slickwilly June 08, 2005
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A modified version of a firmware ( for example on psp) to run homebrew, and custom boots, and text, and whatnot.
made by Dark_Alex a.k.a DAX.
Dude, i just got Custom firmware 3.03 oe-c yesterday!
by MushrumeHedd March 05, 2007
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Like texting while driving wasn't bad enough, Tom was downloading the firmware with the other hand!
by stavio November 17, 2011
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