A reciprocal pronoun is a pronoun that indicates a reciprocal relationship. A reciprocal pronoun can be used for one of the participants of a reciprocal construction, i.e. a clause in which two participants are in a mutual relationship. The reciprocal pronouns of English are one another and each other, and they form the category of anaphors along with reflexive pronouns (myself, yourselves, etc.).

Reflexive versus reciprocal Reflexive pronouns are used similarly to reciprocal pronouns in the sense that they typically refer back to the subject of the sentence.

1. (1) John and Mary like themselves.
2. (2) John and Mary like each other.

The main difference between reflexives, as in example (1), and reciprocal pronouns, as in example (2), is that reflexives are used when the subject acts upon itself. Reciprocals are used when members of a group perform the same action relative to one another. Reciprocal pronouns exist in many languages. They are associated with plural noun phrases and indicate a reciprocal relationship between the members of the plural noun phrase. This means that some member (x) of the plural subject is acting on another member (y) of the subject, and that member (y) is also acting on (x), and that both x and y are members of the group denoted by the antecedent subject.

Below are examples of reciprocal pronouns and how their relationship to their antecedents contrasts to cases of reflexive pronoun relationships, and regular transitive relationships, and how they behave in relation to direct object pronouns in the same situation. Let R denote a Relation, and let the variables (for example, (x, y) ) stand for the arguments introduced by R.