Definition of "serious" []

  • Grave in quality or manner: gave me a serious look. (adjective)
  • Carried out in earnest: engaged in serious drinking; serious study of Italian. (adjective)
  • Deeply interested or involved: a serious card player. (adjective)
  • Designed for and addressing grave and earnest tastes: serious art; serious music. (adjective)
  • Not trifling or jesting: I'm serious: we expect you to complete the assignment on time. Her question was serious enough to deserve a thoughtful response. (adjective)
  • Grave in nature or disposition; thoughtful (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • Marked by deep feeling; in earnest; sincere (adjective)
  • Concerned with important matters (adjective)
  • Requiring effort or concentration (adjective)
  • Giving rise to fear or anxiety; critical (adjective)
  • Worthy of regard because of substantial quantity or quality (adjective)
  • Extreme or remarkable (adjective) (c) HarperCollins Publishers Ltd 2016

Use "serious" in a sentence
  • "Pávlovna, there are things which must be investigated and fully understood before they can be talked about, things too serious, too serious  ..."
  • "She petted the friendly cat, her expression serious as she stared up at James."
  • "Her eyes were alert, her expression serious and self-conscious and beautifully placid."