unformal

Adjective

 * 1) Not formal.
 * 2) * 1820, The Monthly Repository (and Review) (volume 15, page 246)
 * this unformal ceremony, in which the Duchess and her brother mingled with the Deputation as amongst friends of long standing
 * this unformal ceremony, in which the Duchess and her brother mingled with the Deputation as amongst friends of long standing