Cruet/ˈkruːɪt/ Definition 1 of 2Pro Tip 1/3Dining Use Used at mealtime, a 'cruet' holds liquids to add flavor to food. Pass the oil cruet, please. Pro Tip 2/3Set Pairing 'Cruet' often comes in a set, traditionally for oil and vinegar. The dinner table was set with a matching cruet set. Pro Tip 3/3Material Variance Cruets can be made from different materials, not just glass. Her pantry featured a ceramic cruet for olive oil.