/euh looh"zheuhn/ , n.
1. a passing or casual reference; an incidental mention of something, either directly or by implication: an allusion to Shakespeare.
2. the act of alluding.
3. Obs. a metaphor; parable.
[ 1540-50; allusion- (s. of allusio ), equiv. to allus ( us ), ptp. of alludere (see ALLUDE; al- AL- + lud- play + -tus ptp. suffix) + -ion- -ION ]