Advanced … min read · Updated 2026-06-20

Noun & Adjective Clauses (Defining & Non-defining)

A noun clause does the job of a noun (subject, object). An adjective (relative) clause describes a noun and usually begins with who, which, that, whose, where, when.

Noun clause examples

What he said was true. (subject)

I know that you are right. (object)

Adjective clause examples

The man who called is my uncle.

The book that I read was good.

Adjective clauses are of two types:

Defining (no commas) — gives essential information: The boy who won got a prize.

Non-defining (with commas) — gives extra information: My father, who is a doctor, is kind.

Tip: Non-defining clauses sit between commas and can be removed without breaking the main meaning. Defining clauses cannot be removed.

Common mistake: Using that in a non-defining clause. Use who/which with commas: "My car, which is red, is new" (not "that").

✏️ Test Yourself

1. What you need is rest.

2. The girl who sang is my sister.

3. I believe that he is honest.

4. The house that we bought is old.

📒 Words to learn

Meekly (adv)

Meaningin a quiet, gentle, and submissive manner.

Try to talk meekly with anyone.

Melancholy (n)

Meaninga feeling of pensive sadness, typically with no obvious cause.

The film’s tragic ending put all in a melancholy mood.

Opponent (n)

Meaningsomeone who competes against .

I can’t forgive my opponents.

Queer (n)

Meaningstrange; odd.

I was a queer scene in my room.

Philanthropist (N)

Meaninga person who seeks to promote the welfare of others.

Saba Dasthyari was a Philanthropist.

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