noun
(archaic) The omission of a vowel or syllable from a word, usually indicated by the apostrophe symbol ( ' ). examples: 'til, can't
(archaic) The apostrophe symbol used to mark this elision.
(music, historical) An open notehead ( ~ ) or an apostrophe ( ' ) used as a neume to mark a low, unaccented syllable at the beginning of a phrase or a short quick syllable
The symbol 'Ↄ', used in Roman numerals to indicate multiplication by 10.