guest (n.)

Old English gæst, giest (Anglian gest) "an accidental guest, a chance comer, a stranger," from Proto-Germanic *gastiz (source also of Old Frisian jest, Dutch gast, German Gast, Gothic gasts "guest," originally "stranger"), from PIE root *ghos-ti- "stranger, guest, host" (source also of Latin hostis, in earlier use "a stranger," in classical use "an enemy"); the root sense, according to Watkins, probably is "someone with whom one has reciprocal duties of hospitality."

Spelling evolution influenced by Old Norse cognate gestr (the usual sound changes from the Old English word would have yielded Modern English *yest). Meaning "person entertained for pay" (at an inn, etc.) is from late 13c. Old English also had cuma "stranger, guest," literally "a comer." Phrase be my guest in the sense of "go right ahead" first recorded 1955.

guest (v.)

early 14c., "receive as a guest;" 1610s, "be a guest;" 1936, American English, "appear as a guest performer," from guest (n.). Related: Guested; guesting.

updated on May 30, 2017

Definitions of guest from WordNet
guest (n.)
a visitor to whom hospitality is extended;
Synonyms: invitee
guest (n.)
a customer of a hotel or restaurant etc.;
guest (n.)
(computer science) any computer that is hooked up to a computer network;
Synonyms: node / client
Guest (n.)
United States journalist (born in England) noted for his syndicated homey verse (1881-1959);
Synonyms: Edgar Guest / Edgar Albert Guest
Etymologies are not definitions. From, not affiliated with etymonline.