الكلمة المستعملة في غير ما وضعت له في اصطلاح التخاطب على وجه يصح مع قرينة عدم إرادته
A word used, within the governing convention of discourse, for other than its assigned meaning, in an admissible manner, accompanied by an indication that its assigned meaning is not intended.
The conditions are:
1. An actual verbal occurrence.
2. A sense other than the assigned one.
3. Assessment within the relevant speech convention.
4. An admissible relation between the two senses.
5. An indicator ruling out the assigned sense.
Each qualification marks a boundary between figurative expression and related concepts such as literal use, mere error, established transfer, homonymy and allusion.