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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. adj. Distasteful and repellant: hellacious smog.
  2. adj. Slang Extraordinary; remarkable: a hellacious catch of fish.

Wiktionary

  1. adj. nasty, repellent
  2. adj. remarkable, unbelievable, unusual

Etymologies

  1. hell + -acious (as in audacious).

Examples

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Comments

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‘hellacious’ has been looked up 887 times, loved by 3 people, added to 30 lists, commented on 2 times, and has a Scrabble score of 15.