A young woman employed in business or office work. / (idiomatic, euphemistic) A female prostitute.

(US) A member of the Girl Scouts, a worldwide youth organisation for girls, known as Girl Guides in Commonwealth countries.

A right-hand woman

(idiomatic, euphemistic) A female sex slave; prostitute.

(dated) A girl who works serving customers in an inn or public house.

(informal) Discourse between females which is considered to be inappropriate for or uninteresting to male ears.

A participant in a wedding procession, whose responsibility is usually to spread flower petals on the floor before the bride, or to carry a bouquet of flowers. / A girl who sells flowers.

(aviation, dated, now offensive) A female flight attendant.

(telephony, informal, dated) A female telephone operator.

(UK, Canada) Attributive form of Girl Guides.