← DefinitionshareGuesscavalieradjectiveShowing a lack of concern or respect for something important; dismissive or arrogant.nounA supporter of King Charles I during the English Civil War (17th century); often used to refer to a royalist soldier or gentleman.SynonymsdismissiveadjectivearrogantadjectivenonchalantadjectiveAntonymscarefuladjectiverespectfuladjective