What is the meaning of Each?

All; every; qualifying a singular noun, indicating all examples of the thing so named seen as individual or separate items (compare every).

For one; apiece; per.

Individually; separately; used in a sentence with a plural subject to indicate that the action or state described by the verb applies to all members of the described group individually, rather than collectively to the entire group.

Every one/thing individually or one by one.

An individual item: the least quantitative unit in a grouping.

horse

horse (Equus caballus)

brute (coarse person)

eye

Source: wiktionary.org