Definitions for olive oil
Random House Webster's College Dictionary
an oil expressed from the olive fruit, used in cooking, in salad dressings, in medicine, etc.
Origin of olive oil:
oil from olives
Kernerman English Learner's Dictionary
olive oil(noun)ˈɒl ɪv
oil made from olives
an olive oil and lemon juice salad dressing
A vegetable oil, pressed from olives, and used in cooking and as a salad dressing; it is high in unsaturated fatty acids.
Origin: From olive + oil. Compare earlier oil of olives.