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Every one of two or more people or things, considered individually
The teacher gave each child a book.
This means every single child received a book.
Each of the candidates was interviewed separately.
This indicates that every candidate was interviewed one by one.
Often used with 'of' to specify a group (e.g., 'each of the students').
As a determiner, 'each' comes before a noun (e.g., 'each student'). As a pronoun, it replaces the noun (e.g., 'Each was given a prize').
Do not use 'each and every' together, as they mean the same thing.
From Middle English 'eche', from Old English 'ælc', from Proto-Germanic 'alkaz' (every).
Can function as a determiner (before a noun), pronoun (replacing a noun), or adverb (modifying a verb).