An ellipsis (plural: ellipses) is either:
- a punctuation mark, three periods that usually indicate an intentional omission of a word, sentence or whole section, e.g. from a text being quoted, or
- a syntactical construction in which one or more words are omitted or implied that would normally be required by the surrounding words.
Questions about the latter should also be tagged orthography for clarity and to simplify browsing and search.