Definition of "eclipsis"

(obsolete) An omission of words needed to fully express the sense of a phrase

A line or dash used to show that text has been omitted  examples

(Irish grammar, Manx grammar) A mutation of the initial sound of a word by which voiceless sounds become voiced, voiced stops become nasal consonants, and vowels acquire a prothetic nasal consonant: see Appendix:Irish mutations#Eclipsis.  examples