You can picture host as the person who opens their door, welcomes you in, and takes care of you — they have the place, and you are the guest in it. From that one picture grows almost everything: whoever owns the space and looks after the people in it is the host, whether it's a home, a TV studio, a whole country, or even a living body that something else lives inside.
From the word’s history
Latin hospes 'host, guest' gives the core (host/guest were once two sides of one word); the 'a host of / multitude' sense is a different word, Latin hostis 'army, enemy'; the Communion-bread sense is yet another, Latin hostia 'sacrificial victim'.
招待客人的 host 來自拉丁文 hospes（主人／客人，本是一體兩面）；表示「一大群」的 host 其實是另一個字，來自拉丁文 hostis（軍隊、敵人）；聖體那個 host 又是第三個來源，拉丁文 hostia（獻祭的祭品）。三條線剛好撞成同一個拼法。
Online Etymology Dictionary (etymonline.com), entries for host (n.1), host (n.2), host (n.3)
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原始詞典資料15 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
hostnoun詞源 1/həʊst/
- 1
One which receives or entertains a guest, socially, commercially, or officially.
- A good host is always considerate of the guest’s needs.
- Time is like a fashionable host, / That slightly shakes his parting guest by the hand.
- 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
The primary member of a system, typically the member who fronts most often.
- 6
computingengineeringmathematicsAny computer attached to a network.
- 7
biologyecologynatural-sciencesA 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.
- A recent study explored the ecological variables that may contribute to bats’ propensity to harbor such zoonotic diseases by comparing them with another order of common reservoir hosts: rodents.
- 8
biologygeneticsmedicineAn organism bearing certain genetic material, with respect to its cells.
- The so-called junk DNA is known, so far, to provide no apparent benefit to its host.
另外 1 個記錄的用法
- 9
A paid male companion offering conversation and in some cases sex, as in certain types of bar in Japan.
hostverb詞源 1/həʊst/
- 1
To perform the role of a host.
- Our company will host the annual conference this year.
- I was terrible at hosting that show.
- 2
obsoleteTo lodge at an inn.
- Where you shall host.
- 3
computingengineeringmathematicsTo run software made available to a remote user or process.
- Kremvax hosts a variety of services.
- CMU/TEK TCP/IP software uses an excessive amount of cpu resources for terminal support both outbound, when accessing another system, and inbound, when the local system is hosting a session.
hostnoun詞源 2/həʊst/
- 1
A multitude of people arrayed as an army; used also in religious senses, as: Heavenly host (of angels)
- Why, Plugson, even thy own host is all in mutiny: Cotton is conquered; but the ‘bare backs’ — are worse covered than ever!
- All about the hosts of Mordor raged.
- 2
A large number of items; a large inventory.
- The dealer stocks a host of parts for my Model A.
- There are a host of reasons for this decision.
hostnoun詞源 3/həʊst/
- 1
ChristianityThe consecrated bread of the Eucharist.
- Do you pray to the Holy Ghost when you suck your host? / Do you read who's dead in the Irish Post?
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。