1. most unfashionable or unstylish in dress or appearance; least attractive or appealing
Usage: superlative form of dowdy

Examples

• She wore the dowdiest outfit to the party.
• Among all the dresses in the store, that was the dowdiest one.
• His dowdiest shirt was still better than anything I owned.
• The dowdiest room in the house needed a complete makeover.
• Even her dowdiest clothes looked elegant on her.
• The dowdiest member of the group surprised everyone with her talent.