from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Destructively or frenetically violent: a berserk worker who started smashing all the windows.
- adj. Mentally or emotionally upset; deranged: berserk with grief.
- adj. Informal Unrestrained, as with enthusiasm or appetite; wild: berserk over chocolates.
- n. One that is violent, upset, or unrestrained.
- n. A berserker.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A crazed Norse warrior who fought in a frenzy.
- adj. Injuriously, maniacally, or furiously violent or out of control.
from the GNU version of the Collaborative International Dictionary of English
- n. One of a class of legendary heroes, who fought frenzied by intoxicating liquors, and naked, regardless of wounds.
- n. One who fights as if frenzied, like a Berserker.
- adj. frenzied; crazed; usually in predicate position.
from The Century Dictionary and Cyclopedia
- n. Same as berserker.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. one of the ancient Norse warriors legendary for working themselves into a frenzy before a battle and fighting with reckless savagery and insane fury
- adj. frenzied as if possessed by a demon
Back-formation from berserker.(American Heritage® Dictionary of the English Language, Fourth Edition)
Old Norse berserkr (Icelandic berserkur), probably from bjǫrn ("bear") + serkr ("coat"), compare sark. (Wiktionary)