The omission of a sound or syllable when speaking. In poetry, elision is often used to maintain the meter of a line.
The omission of one or more letters or words in writing, often indicated by an apostrophe or other mark. The elision in "don't" shows the omission of the letter "o" from "do not".
The deliberate omission of any element within a text, speech, or film. Viewers criticised the elision of key historical events from the documentary.