a woman who receives and entertains guests in her own home or elsewhere.

a woman employed in a restaurant or place of amusement to receive, seat, or assist patrons.

a woman who acts as master of ceremonies, moderator, or interviewer for a television or radio program; host.

a woman employed by an airline, railroad, bus company, etc., to see that passengers are comfortable throughout a trip, usually receiving and seating them, and sometimes serving them refreshments.

a woman who manages a resort or hotel or who directs its social activities.

taxi dancer.

to be the hostess at (a reception, dinner, etc.)

She will hostess a shower for the new bride.

to act as hostess at, to, or for

She volunteered to hostess the garden club next season.

to perform the duties or functions of a hostess.

noun

lady of the house , mistress of the household , toastmistress , host , mistress of ceremonies , m.c. emcee