Definition of "unceremonious"
adjective
comparative more unceremonious, superlative most unceremonious
Not ceremonious.
Quotations
Mrs. De Brooke replied, that she could have no objection to form the acquaintance of Mrs. Belmour, since it appeared she was so unceremonious and so conformable to the taste of her friends, in respect to her mode of visiting them.
1838, [Letitia Elizabeth] Landon (indicated as editor), chapter V, in Duty and Inclination: […], volume III, London: Henry Colburn, […], page 52