The quality of being serious and thoughtful.

गंभीरता और सोचने की गुणवत्ता

English Usage: His serious-mindedness made him a reliable leader during crises.

Hindi Usage: उसकी गंभीरता और सोचने की गुणवत्ता ने उसे संकटों के दौरान एक विश्वसनीय नेता बना दिया।