noun
tableware set; dinner set
Refers to a complete matching set of dishes, bowls, and other tableware, often for a specific number of people.
新居に合わせて食器一揃いを買い替えた。
We replaced our entire dinner set to match the new house.
食器 is the general term for tableware or dishes, while 食器一揃い specifically means a complete matching set.
Compound of 食器 (tableware) + 一揃い (a complete set).