1. （举办聚会等的）女主人，女东道主
The hostess at a party is the woman who has invited the guests and provides the food, drink, or entertainment.
e.g. The hostess introduced them...
女主人介绍了他们。
e.g. She was a superb hostess to us all.
她对我们大家来说都是个出色的女主人。
2. （夜总会或舞厅的）三陪女郎，舞女
A hostess at a night club or dance hall is a woman who is paid by a man to be with him for the evening.
名词女主人；女房东；（夜总会的）女招待；（电视或广播节目的）女主持人动词在…作女主人；作女主人招待网络女服务员；空姐；旅馆女老板