Use the adjective each when every separate person or thing in a group is considered individually, one by one or piece by piece. If all the guests at your party will go home with a goody bag, you can say that each person will get one.

The word each is useful for singling out one instance, item, or person from a larger group. When it's used as an adverb, it basically means "apiece." You might, for example, say, "These cupcakes cost me three dollars each," or "My siblings and I have one cat each — all together, we have six cats in our family." The Old English root of each, , is based on a Germanic phrase that means "ever alike."

Definitions of each

adj (used of count nouns) every one considered individually

each person is mortal”
each party is welcome”
quantifier; used with either mass or count nouns to indicate the whole number or amount of or every one of a class

adv to or from every one of two or more (considered individually)

“they received $10 each
apiece, for each one, from each one, to each one

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