English dictionary definition of:



  • causing fear or anxiety by threatening great harm
  • requiring effort or concentration; complex and not easy to answer or solve
  • of great consequence
  • appealing to the mind
  • concerned with work or important matters rather than play or trivialities
  • completely lacking in playfulness


dangerous good grave grievous life-threatening severe sober unplayful

Spellzone course content

View spelling list The ending ious and learn about the word serious in the Spellzone English spelling course, Unit 29. Word ending: -ous.

Scrabble score for serious

Scrabble score = 7

generated at 14:36:43 on 18-11-19

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"I ran the trial with a small group of students over three weeks before the summer holidays," she says. "I quickly saw the benefits, and signed up."

King's Leadership Academy, Warrington