2. The state of being related or of referring; what is apprehended as appertaining to a being or quality, by considering it in its bearing upon something else; relative quality or condition; the being such and such with regard or respect to some other thing; connection; as, the relation of experience to knowledge; the relation of master to servant. Any sort of connection which is perceived or imagined between two or more things, or any comparison which is made by the mind, is a relation. (I. Taylor)
4. Connection by consanguinity or affinity; kinship; relationship; as, the relation of parents and children. Relations dear, and all the charities Of father, son, and brother, first were known. (milton)
6. The carrying back, and giving effect or operation to, an act or proceeding frrom some previous date or time, by a sort of fiction, as if it had happened or begun at that time. In such case the act is said to take effect by relation. The act of a relator at whose instance a suit is begun.
Origin: F. Relation, L. Relatio. See Relate.