Saying to someone, "boy you look really tired, have you been getting enough sleep" instead of telling someone they look old because of wrinkles under their eyes is an example of an allusion.
Without naming names, the candidate criticized the national leaders by allusion.
An allusion to classical mythology in a poem.
Origin of allusion
- Late Latin allūsiō allūsiōn- a playing with from Latin allūsus past participle of allūdere to play with allude
From American Heritage Dictionary of the English Language, 5th Edition