"person who receives guests," late 13c., from Old French hoste "guest, host, hostess, landlord" (12c., Modern French hôte), from Latin hospitem (nominative hospes) "guest, host," literally "lord of strangers," from PIE *ghostis- "stranger" (cf. Old Church Slavonic gosti "guest, friend," gospodi "lord, master;" see guest). The biological sense of "animal or plant having a parasite" is from 1857.
"multitude" mid-13c., from Old French host "army" (10c.), from Medieval Latin hostis "army, war-like expedition," from Latin hostis "enemy, foreigner, stranger," from the same root as host (n.1). Replaced Old English here, and in turn has been largely superseded by army. The generalized meaning of "large number" is first attested 1610s.
"body of Christ, consecrated bread," c.1300, from Latin hostia "sacrifice," also "the animal sacrificed," applied in Church Latin to Christ; probably ultimately related to host (n.1) in its root sense of "stranger, enemy."
"to serve as a host," early 15c., from host (n.1). Related: Hosted; hosting.
The animal or plant on which or in which a parasitic organism lives.
The recipient of a transplanted tissue or organ.
an entertainer (Rom. 16:23); a tavern-keeper, the keeper of a caravansary (Luke 10:35). In warfare, a troop or military force. This consisted at first only of infantry. Solomon afterwards added cavalry (1 Kings 4:26; 10:26). Every male Israelite from twenty to fifty years of age was bound by the law to bear arms when necessary (Num. 1:3; 26:2; 2 Chr. 25:5). Saul was the first to form a standing army (1 Sam. 13:2; 24:2). This example was followed by David (1 Chr. 27:1), and Solomon (1 Kings 4:26), and by the kings of Israel and Judah (2 Chr. 17:14; 26:11; 2 Kings 11:4, etc.).