- A festive or drinking song or glee.
- The beverage served during a wassail, especially one made of ale or wine flavoured with spices, sugar, roasted apples, etc.
- A toast to health, usually at a festival.
- To go from house to house at Christmastime, singing carols.
- (intransitive) To drink wassail.
- (transitive) To toast, to drink to the health of another.
"The next morning he much regretted the gusto with which he had wassailed the night before."