Definition of "solemn" []

• Deeply earnest, serious, and sober. (adjective)
• Somberly or gravely impressive. See Synonyms at serious. (adjective)
• Performed with full ceremony: a solemn High Mass. (adjective)
• Invoking the force of religion; sacred: a solemn vow. (adjective)
• Gloomy; somber. (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.

• "But he gave what he called a solemn pledge: "We will hold ourselves responsible to do what it takes, as long as it takes, to stop this catastrophe, to repair the damage and to keep this region on its feet.""
• "His expression solemn, he pulled the strip of plaid from behind his shoulder and draped the end over their joined hands."
• "This opening round of hospitality completed, he seemed at a loss, his expression solemn."