From Longman Dictionary of Contemporary Englishgravitasgrav‧i‧tas /ˈɡrævɪtæs/ noun [uncountable] formalSERIOUS/NOT JOKING a seriousness of manner that people respect
Examples from the Corpus
gravitas• He has a gravitas that has not just been put on like a flashy waistcoat, nor indeed a Garrick Club tie.• He provides the intellectual thrust and gravitas of the arguments of those who oppose monetary and political union.• His gravitas, offset with a flickering irony, gives the production a strong moral centre.• First, he needs more gravitas.• Badger is a retired schoolmaster, rather short on gravitas.• The reined-in impatience which so often emanated from Ian was absent, Theodora's gravitas mitigated and Julia's social nervousness sedated. 