A person dressed in a dress with flowers and a stuffed bee attached to it, is pushing a baby stroller down the street.
An old lady pushing a stroller down a busy street.
The street doesn't have to be busy and might be empty.
A person in a dress of a particular type need neither be old nor female.  A street need not be considered busy if only one person is pushing a stroller down it.
Not all women who wear dresses are an old lady.