A multitude of people arrayed as an army; used also in religious senses, as: Heavenly host (of angels)
One that provides a facility for an event.
The consecrated bread of the Eucharist.
A cell or organism which harbors another organism or biological entity, usually a parasite.
A moderator or master of ceremonies for a performance.
An organism bearing certain genetic material, with respect to its cells.
A large number of items; a large inventory.
Any computer attached to a network.
One which receives or entertains a guest, socially, commercially, or officially.
A paid male companion offering conversation and in some cases sex, as in certain types of bar in Japan.
A person or organization responsible for running an event.
To perform the role of a host.
To run software made available to a remote user or process.
endlessness, unlimitedness, absence of a beginning, end or limits to size.
A number that has an infinite numerical value that cannot be counted.
The symbol ∞.
A number which is very large compared to some characteristic number. For example, in optics, an object which is much further away than the focal length of a lens is said to be "at infinity", as the distance of the image from the lens varies very little as the distance increases further.
An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.