ETYM Latin, from Greek elleipsis a leaving, defect, from elleipein to leave in, fall short; en in + leipein to leave. Related to In, and Loan, Ellipse.
Omission or suppression of parts of words or sentences; SYN. eclipsis.
(plural ellipses) Omission of one or more words in a sentence; a punctuation mark (.) to suggest this. Ellipsis of a relative that is common in English (“the song [that] she sang”), as is ellipsis of identical forms of be and have to avoid repetition (“the rabbits were fed and the horses [were] watered”). In punctuation, ellipsis indicates that a sentence has not been completed.
Intentional omission of grammatically necessary words.

A set of three dots (...) used to convey incompleteness. In many windowing applications, selection of a command that is followed by an ellipsis will produce a submenu or a dialog box. In programming and software manuals, an ellipsis in a syntax line indicates the repetition of certain elements. See also dialog box, syntax.