Look-alikes

Dairy vs Diary

What is the difference between dairy and diary?

Dairy (/ˈdeəri/, rhymes with hairy) means milk products. A diary (/ˈdaɪəri/, DIE-a-ree) is a book for your daily notes or plans.

Dairy vs Diary at a glance

  • dairy

    /ˈdeəri/ · noun / adjective

    Milk and food made from milk, such as cheese and butter, or a farm that produces it.

    • I don't eat dairy, so I have oat milk in my coffee.
    • The dairy section is at the back of the supermarket.
  • diary

    /ˈdaɪəri/ · noun

    A book where you write about your day, or where you plan appointments.

    • I've kept a diary since I was twelve.
    • Let me check my diary – I might be free on Friday.

How to remember it

In diary, the I comes first: "I write in my diary." In dairy, the A comes first, and it sounds like 'air' – a dairy farm in the fresh air.

Good to know

Diary has three syllables, dairy has two. In British English, diary is also the normal word for a planner or calendar; Americans more often say calendar or planner for that.

Common mistakes

  • Wrong: She writes in her dairy every night.

    Right: She writes in her diary every night.

  • Wrong: He can't eat diary products because he's lactose intolerant.

    Right: He can't eat dairy products because he's lactose intolerant.

Quick quiz

  1. 1.Milk, yoghurt and cheese are all products.

  2. 2.I'll put the meeting in my so I don't forget.

  3. 3.Anne Frank's is one of the most famous books in the world.

Pick the right word for each gap.