Allusion | Literary Term - Definition, Characteristic and Examples | Learning The Easy Way

Allusion:

Allusion is an implicit or indirect reference to another work  of art or literature. It is a passing reference to historical or fictional characters, place, or event. It may refer to mythology, religion, literature, history or art. It is used not only in literature but also in our daily speech. 

For examples: 

"Don't act like a Romeo in front of her."

Here,
Romeo is an implicit or indirect reference to Shakespeare's Romeo, a passionate lover of Juliet, in "Romeo and Juliet".