An individual item: the least quantitative unit in a grouping.
(used of count nouns) every one considered individually
"each person is mortal"
"each party is welcome"
to or from every one of two or more (considered individually)
"they received $10 each"
For one; apiece; per.
All; every; qualifying a singular noun, indicating all examples of the thing so named seen as individual or separate items (compare every).
Every one/thing individually or one by one.