Definition of: apostrophe

(ə·pos′trə·fē) noun
1. A symbol (') above the line, to mark the omission of a letter or letters from a word, to indicate the possessive case, the end of a quotation, or the plural of figures or letters.
2. The omission so indicated. [ <F <L apostrophus <Gk. apostrophos]
—ap·os·troph·ic (ap′ə·strof′ik) adjective