serious-minded
adjective
se·ri·ous-mind·ed ˌsir-ē-əs-ˈmīn-dəd 
: having a serious disposition or trend of thought
serious-mindedly adverb
serious-mindedness noun
Word History
First Known Use
1845, in the meaning defined above
serious-mindedness
noun
as in intentness
a mental state free of jesting or trifling she approached the task with her usual serious-mindedness Synonyms & Similar Words
Relevance
- intentness
- gravity
- earnestness
- seriousness
- attentiveness
- earnest
- solemnness
- decisiveness
- intensity
- concentration
- staidness
- absorption
- purposefulness
- solemnity
- graveness
- humorlessness
- soberness
- determination
- deliberation
- sobriety
- resolve
- immersion
- gravitas
- resoluteness
- engrossment
- firmness
- enthrallment
Antonyms & Near Antonyms
- play
- lightness
- flippancy
- levity
- frivolity
- lightheartedness
- frivolousness
- facetiousness
- lightness
- superficiality
- flightiness
- shallowness
- unseriousness
- dilettantism
- dalliance
- cheerfulness
- mirth
- glee
- gayety
- gaiety
- high-spiritedness
- merriment