A reference at one place in a work to information at another place in the same work; SYN. cross-index. cross-reference
A notation or direction at one place (as in a book or filing system) to pertinent information at another place.

1. The act of referring; SYN. consultation.
2. The relation between a word or phrase and the object or idea it refers to
3. The class of objects that an expression refers to; SYN. denotation, extension.
4. A publication (or a passage from a publication) that is referred to; SYN. source.