Idiom B2 Creativity

Think Outside the Box

Think creatively; consider unusual or unconventional ideas and solutions

Pedagogically reviewed by LexFizz Team

Quick answer: “Think Outside the Box” means think creatively; consider unusual or unconventional ideas and solutions.

Quick Definition

Think outside the box — to think creatively and consider unusual or unconventional ideas or approaches, rather than relying on established or expected ways of doing things.

Origin & History

The phrase is believed to be connected to the “nine dots puzzle” — a classic lateral thinking problem in which you must connect nine dots arranged in a 3×3 grid using four straight lines without lifting the pen. The solution requires drawing lines that extend beyond the imaginary “box” formed by the dots. The puzzle was widely used in management and creativity training from the 1970s and 1980s, and the phrase “thinking outside the box” emerged from this training culture. It became one of the defining idioms of the business world in the 1990s.

Today “think outside the box” is one of the most widely recognised (and sometimes overused) idioms in professional English. It is a call for creative, unconventional thinking — stepping beyond the usual boundaries of a problem to find novel solutions. Reference works such as the Cambridge Dictionary catalogue thousands of such figurative expressions, showing how idiomatic meanings take shape over time.

Example Sentences

SentenceContext
We need to think outside the box if we’re going to solve this problem before the deadline.Creative problem-solving
The marketing team were encouraged to think outside the box for the new campaign.Workplace creativity
Great entrepreneurs are people who think outside the box and challenge assumptions.Entrepreneurship
Thinking outside the box led the researchers to a breakthrough no one had anticipated.Scientific innovation
He was always thinking outside the box, which made him an invaluable member of the team.Positive description
The school encourages pupils to think outside the box rather than just memorise answers.Education

Use It in Conversation

Dialogue Example

Alex: We keep trying the same approaches and nothing is working.

Nina: Maybe it’s time to think outside the box. What if we tried the exact opposite of what we’ve been doing?

Alex: Interesting. Let’s brainstorm some unconventional ideas this afternoon.

How to Use It

The idiom is neutral but has become associated with corporate language and can sound clichéd in some business contexts. It is followed by a purpose: “think outside the box to find a solution.” The past form is “thought outside the box.” It can be used as advice, description, or encouragement.

Common Mistakes

Mistakes to Avoid

Let’s think outside of box.

Let’s think outside the box. — Always include “the” before “box”; also avoid “of” in standard usage.

We need to think out of box.

We need to think outside the box. — The standard idiom uses “outside”, not “out of”.

Related Idioms

Go Against the Grain Get the Hang of Something Know the Ropes Put Your Best Foot Forward All Idioms →

Practise This Idiom

Flash Card Practice Test Yourself

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Want to understand the grammar behind this? Explore our Grammar guides.

Quick Check: Think Outside the Box

2 questions — test what you just learned.

1. What does “Think Outside the Box” mean?

2. Complete the sentence: “We need to _____ if we’re going to solve this problem before the deadline.”

Frequently Asked Questions

What does “think outside the box” mean?
“Think outside the box” means to think creatively and consider unconventional ideas or approaches, rather than following established or expected ways of solving a problem.
Where does “think outside the box” come from?
The phrase is linked to the nine dots puzzle — a lateral thinking exercise where the solution requires drawing lines beyond the grid’s boundary. The idiom emerged from management training culture in the 1970s–80s and became a business cliché in the 1990s.
Can you give an example of “think outside the box” in a sentence?
Example: “We need to think outside the box if we’re going to solve this problem before the deadline.” It calls for creative and unconventional approaches.
Is “think outside the box” formal or informal?
The idiom is neutral but widely perceived as a business cliché. It is very common in professional and educational contexts, though some people find it overused.
What CEFR level is “think outside the box”?
Typically B2 (Upper-Intermediate). It is one of the most widely recognised idioms in modern English, particularly in business and education.
Is “think outside the box” a cliche?
In heavy business use, yes — many professionals consider it overused. However, it remains clear, widely understood, and useful, especially for English learners developing their idiom vocabulary.
What idioms are similar to “think outside the box”?
Similar expressions include “push the envelope” (go beyond established limits), “be innovative” (more direct), “colour outside the lines” (be creative and unconventional), and “lateral thinking” (a noun phrase for the same concept).
How do I practise “think outside the box”?
Describe a problem you are facing and write two solutions — one conventional, one unconventional. Use the idiom to introduce the creative solution. Then try LexFizz Flash Cards.
Can “outside the box” be used as an adjective?
Yes. “Outside-the-box thinking” or “an outside-the-box approach” are common adjective phrases, especially in professional writing: “We need outside-the-box solutions.”
Is “think outside the box” used the same way in British and American English?
Yes. The idiom is equally common in both varieties of English and is understood globally in business, education, and everyday creative contexts.