1. The action of mentioning or alluding to something.
2. The use of a source of information in order to ascertain something.
3. A letter from a previous employer testifying to someone's ability or reliability, used when applying for a new job.
4. Provide (a book or article) with citations of sources of information.
5. Mention or refer to.
Plural Noun: References
Verb form: Reference, Referenced, Referenced
Neena made no reference to their absence.