serious

• "a serious student of history"
• "a serious attempt to learn to ski"
• "gave me a serious look"
• "a serious young man"
• "are you serious or joking?"
• "Don't be so serious!"

• "marriage is a serious matter"

• "a dangerous operation"
• "a grave situation"
• "a grave illness"
• "grievous bodily harm"
• "a serious wound"
• "a serious turn of events"
• "a severe case of pneumonia"
• "a life-threatening disease"

Synonyms

• dangerousinvolving or causing danger or risk; causing fear or anxiety by threatening great harm
• graveshape (a material like stone or wood) by whittling away at it; carve, cut, or etch into a material or surface; death of a person; a place for the burial of a corpse (especially beneath the ground and marked by a tombstone); a mark (`) placed above a vowel to indicate pronunciation ; dignified and somber in manner or character and committed to keeping promises; causing fear or anxiety by threatening great harm; of great gravity or crucial import
• grievouscausing fear or anxiety by threatening great harm; causing or marked by grief or anguish; of great gravity or crucial import; shockingly brutal or cruel
• severeintensely or extremely bad or unpleasant in degree or quality; very strong or vigorous; severely simple; unsparing and uncompromising in discipline or judgment; causing fear or anxiety by threatening great harm; very bad in degree or extent
• life-threateningcausing fear or anxiety by threatening great harm

• "good music"
• "a serious book"

Synonyms

• good(often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well'); completely and absolutely (`good' is sometimes used informally for `thoroughly'); benefit; moral excellence or admirableness; that which is pleasing or valuable or useful; articles of commerce ; having desirable or positive qualities especially those suitable for a thing specified; having the normally expected amount; morally admirable ; deserving of esteem and respect; promoting or enhancing well-being; agreeable or pleasing; of moral excellence; having or showing knowledge and skill and aptitude; thorough; with or in a close or intimate relationship; financially safe; most suitable or right for a particular purpose; resulting favorably; exerting force or influence; capable of pleasing; appealing to the mind; in excellent physical condition; tending to promote physical well-being; not forged; not left to spoil; generally admired

Synonyms

• unplayfulcompletely lacking in playfulness
• sobercause to become sober; become more realistic; become sober after excessive alcohol consumption; not affected by a chemical substance (especially alcohol) ; dignified and somber in manner or character and committed to keeping promises; lacking brightness or color; completely lacking in playfulness

• "complex and not easy to answer or solve"
• "raised serious objections to the proposal"
• "the plan has a serious flaw"