adj. 1. Destructively or frenetically violent: a berserk worker who started smashing all the windows. 2. Mentally or emotionally upset; deranged: berserk with grief. 3. Informal Unrestrained, as with enthusiasm or appetite; wild: berserk over chocolates. n. 1. One that is violent, upset, or unrestrained. 2. A berserker. [Back-formation from BERSERKER.] ber·serk adv. ber·serkly adv. |
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