"飲食" is a formal term referring to "eating and drinking" or "food and drink" in general. It's often used in public signs or regulations, like "飲食禁止" (no eating or drinking).

「食べることと飲むこと」、または「飲食物」全体を指す言葉です。「飲食禁止」のように、規則や案内でよく使われます。