Definition of mary poppins in English English dictionary
a US film in which Julie Andrews appears as a nanny (=a woman who is employed to take care of the children in a family) called Mary Poppins, who has magical powers and can fly (1964)
{i} book written by P. L. Travers in 1934; 1964 United State musical movie adapted from Travers' book and starring Julie Andrews; fictional protagonist character (who is a magical nanny) in Travers' Mary Poppins books and in the movie adaptation