Main entry: serious
Definition: concerned with work or important matters rather than play or trivialities
Usage: 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!
Antonyms: frivolous
Definition: not serious in content or attitude or behavior
Antonyms: unreal
Definition: lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria
Antonyms: unreal
Definition: not actually such; being or seeming fanciful or imaginary
Antonyms: nominal
Definition: of, relating to, or characteristic of an amount that is not adjusted for inflation
Antonyms: liquid
Definition: existing as or having characteristics of a liquid; especially tending to flow
Antonyms: gaseous
Definition: existing as or having characteristics of a gas
Antonyms: hollow
Definition: not solid; having a space or gap or cavity
Antonyms: stimulate, brace, arouse, energise, energize, perk up
Definition: cause to be alert and energetic
Antonyms: drunk, inebriated, intoxicated
Definition: stupefied or excited by a chemical substance (especially alcohol)
Antonyms: thoughtless
Definition: showing lack of careful thought
Antonyms: insincere
Definition: lacking sincerity
Main entry: sober, serious, unplayful
Definition: completely lacking in playfulness
Antonyms: playful
Definition: full of fun and high spirits
Main entry: serious, good
Definition: appealing to the mind
Usage: good music; a serious book
Antonyms: nonintellectual
Definition: not intellectual
Main entry: dangerous, grave, grievous, life-threatening, serious, severe
Definition: causing fear or anxiety by threatening great harm
Usage: 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
Antonyms: uncritical
Definition: not critical; not tending to find or call attention to errors
Antonyms: noncritical, uncritical
Definition: marked by disregard for critical standards or procedures
Antonyms: noncritical, noncrucial
Definition: not in a state of crisis or emergency
Antonyms: noncritical
Definition: not critical; not at a point of abrupt change
Main entry: serious
Definition: of great consequence
Usage: marriage is a serious matter
Antonyms: unimportant
Definition: not important
Main entry: serious
Definition: requiring effort or concentration; complex and not easy to answer or solve
Usage: raised serious objections to the proposal; the plan has a serious flaw
Antonyms: easy
Definition: posing no difficulty; requiring little effort
Antonyms: soft
Definition: yielding readily to pressure or weight
Antonyms: soft
Definition: compassionate and kind; conciliatory
Antonyms: soft
Definition: (of speech sounds); produced with the back of the tongue raised toward the hard palate; characterized by a hissing or hushing sound (as `s' and `sh')
Antonyms: diffuse, diffused, soft
Definition: (of light) transmitted from a broad light source or reflected