Definition of HOST

a great number of persons or creatures massed together <a host of people of all faiths gathered in St. Peter's Square to see the Pope>
a large body of men and women organized for land warfare <the small band of defenders was no match for the enemy's mighty host of thousands>
a person who conducts a program of entertainment by making introductions and providing continuity <our favorite morning TV show has a new host>
Synonyms emcee, host, MC

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