Informal.
a person who is ideally or excessively self-possessed, poised, or reserved (sometimes used with Miss, Ms., or Mrs. instead of Mr. when referring to a female).
Informal.
a person who is ideally or excessively self-possessed, poised, or reserved (sometimes used with Miss, Ms., or Mrs. instead of Mr. when referring to a female).
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012