A fair is an exhibition of products or services in a specific area of activity held with the objective of promoting business.
If your question concerns the term 'fair' itself, and where that came from - the etymology - then 'fair' was, in the aforementioned respect, probably derived from the Latin verb 'ferre', which means 'to carry/bring'. A fair typically is a place where products and services were 'brought' to.
The Engish word for the noun feria is "fair" (e.g. trade fair, county fair, book fair).
The noun fair is a common noun unless used for a specific fair such as the Washington County Fair or for a title such as the Simon and Garfunkel song 'Scarborough Fair'. The word fair is also an adjective and an adverb.
(Fair and fare are homophones, sound-alike words, which can contributes to misspelling.)(adjective-noun)"He did not think it was fair that he pay a bus fare for his dog."(noun-noun)"The railroad offered a reduced fare for travel to the county fair."
fair: 1-free from favoritism or self-interest or bias or deception "a fair referee", 2-attractively feminine "the fair sex", 3-gathering of producers to promote business "book fair", 4-a competitive exhibition of farm products "she won a blue ribbon for her baking at the county fair", 5-pleasing "today will be fair and warm"
"Fair" can be used as both an adjective and a noun, but not as a verb. As an adjective, it describes something as just, equitable, or pleasing. As a noun, it refers to a gathering with amusement rides, games, and food. It does not have a commonly accepted definition as a verb in English.
The County Fair was created in 1912.
fair, as in, It's fair. It's not fair. : Es justo. No es justo. fair, as in, at the fair, county fair : feria
Neshoba County Fair was created in 1889.
Umatilla County Fair was created in 1912.
Clark County Fair was created in 1868.
Tillamook County Fair was created in 1891.
County Fair was created on 1962-11-26.
Lycoming County Fair was created in 1870.
Arts County Fair was created in 1992.
Arts County Fair ended in 2007.
You can find a schedule of events for the Oceana County Fair online at the Fair website - www.oceanafair.com
Any test administered at a fair, such as a County or State fair can be described as a Fair Test.