Being either or any unit of a numerical aggregate consisting of two or more, indefinitely: used in predicating the same thing of both or all the members of the pair, aggregate, or series mentioned or taken into account, considered individually or one by one: often followed by one, with of before a noun (partitive genitive): as, each sex; each side of the river; each stone in a building; each one of them has taken a different course from every other.
Every one of any number or numerical aggregate, considered individually: equivalent to the adjectival phrase each one: as, each went his way; each had two; each of them was of a different size (that is, from all the others, or from every one else in the number).
Both.
Each the other; one another: now generally used when two persons or things are concerned, but also used more loosely like one another (which see, under another): as, they love each other (that is, each loves the other).