Repeating the search engine registration process one or more times for the same page or site. Under certain circumstances, this is regarded with suspicion by the search engines, as it could indicate that someone is experimenting with spamming techniques.
The Infoseek and Altavista search engines are particularly vulnerable to spamming because they list sites very quickly, and are thus easy to experiment with. Both engines de-list sites for repeated re-submission and Infoseek, for example, does not allow more than one submission of the same page in a 24 hour period. Occasional re-submission of changed pages is not normally a problem.

This definition is in context to Search Engine Optimization. See more contextual defintions for Re-submission.