Host

1. One which receives or entertains a guest, socially, commercially, or officially.

   A good host is always considerate of the guest’s needs.

2. One that provides a facility for an event.
3. A person or organization responsible for running an event.

   Our company is host of the annual conference this year.

4. A moderator or master of ceremonies for a performance.

   The host was terrible, but the acts themselves were good.

5. Any computer attached to a network.
6. A cell or organism which harbors another organism or biological entity, usually a parasite.

   Viruses depend on the host that they infect in order to be able to reproduce.

7. (evolution) An organism bearing certain genetic material.

   The so-called junk DNA is known, so far, to provide no apparent benefit to its host.

8. A paid male companion offering conversation and in some cases sex, as in certain types of bar in Japan.

1. To perform the role of a host.

   I was terrible at hosting that show.

2. To lodge at an inn.
3. To run software made available to a remote user or process.

   Kremvax hosts a variety of services.

1. A multitude of people arrayed as an army; used also in religious senses, as: Heavenly host (of angels)
2. A large number of items; a large inventory.

   The dealer stocks a host of parts for my Model A.

noun

The consecrated bread or wafer of the Eucharist.