Is dress-up one or two words?

Is dress-up one or two words? adjective Describing an occasion that requires one to dress in formal or fanciful attire. In this usage, the phrase is typically hyphenated. Tonight’s dinner is a dress-up event, so be sure to wear a suit and tie.

adjective Describing an occasion that requires one to dress in formal or fanciful attire. In this usage, the phrase is typically hyphenated. Tonight’s dinner is a dress-up event, so be sure to wear a suit and tie.