My significant other ate cucumbers and onion with some ranch. I called it a cucumber onion salad. She says there aren’t enough ingredients to call it a salad, because “it takes multiple ingredients”. I pointed out she had three and asked what the minimum is. She refuses to answer so I ask Lemmy.
I would say the important distinction is in presentation. Was it a bowl of onion and cucumber mixed together with ranch? If so salad. Was it a plate with a pile of cucumber and a pile of onion, with ranch for dipping? If so crudites.