crosspost

Meanings

1. An electronic message posted to multiple newsgroups or forums simultaneously.
2. An instance of crossposting, or the post thus created.

1. To post (a message) to multiple newsgroups or forums simultaneously.
2. To post an entry (in a book index or other index) such that no matter which word a user looks under, they will find the relevant entry (see examples).

Etymology

From cross- + post.