sharp as a tack

USAGE SUMMARY

The expression 'sharp as a tack' is correct and usable in written English.
It is used to describe someone that is very intelligent, or has sharp senses. For example, you could say: "My grandmother is still sharp as a tack at 92 years old!".

✓ Grammatically correct

News & Media

Human-verified examples from authoritative sources

Exact Expressions

56 human-written examples

During the trip, Mr. Obama told reporters that Ms. Dunham was "sharp as a tack," but that her osteoporosis prevented her from traveling.

The New York Times

"And he's sharp as a tack.

The New York Times - Sports

He is as sharp as a tack.

The New Yorker

"He's sharp as a tack".

The New York Times

"She was as sharp as a tack.

The New York Times

Or when they're completely sharp as a tack, that's easy.

The Washington Post

"They're bright as a button, sharp as a tack.

The Guardian - Sport

Human-verified similar examples from authoritative sources

Similar Expressions

4 human-written examples

"Fantastic beer!" came his sharp-as-a-tack response.

Independent

Westerberg emerged as the group's leader, providing ragged lead vocals and hooky, sharp-as-a-tack songs that grew steadily hookier and sharper as the albums progressed.

The New Yorker

CARINE ROITFELD French Vogue The look... Hard-core fashion dominatrix — sharp-as-a-tack shoes, leg-baring mini-jupes, cropped jackets, plenty of kohl.

The New York Times - Style

Now let's take a look at two hypothetical situations -- a terrible cost control big organization, and a sharp-as-a-tack small business.

Huffington Post

Expert writing Tips

Best practice

Use "sharp as a tack" to describe someone's mental acuity, especially when you want to emphasize their alertness and quick understanding. This idiom adds a vivid and memorable image to your description.

Common error

Avoid using "sharp as a tack" in formal or academic writing where a more direct term like "intelligent" or "astute" might be more appropriate. The idiom is generally informal and best suited for conversational or descriptive contexts.

Linguistic Context

"Sharp as a tack" functions as an adjective phrase, modifying a noun or pronoun to describe someone's intelligence or mental acuity. Ludwig's examples show it used to describe people who are alert, quick-witted, or knowledgeable.

Expression frequency: Very common

Frequent in

News & Media

100%

Less common in

Formal & Business

0%

Science

0%

Academia

0%

Ludwig's WRAP-UP

"Sharp as a tack" is a common idiom used to describe someone who is intelligent and mentally alert. As Ludwig AI confirms, the phrase is grammatically correct and widely used, particularly in news and media contexts. While suitable for general conversation and descriptive writing, consider more formal alternatives like "astute" or "perceptive" in academic or professional settings. Remember to use the phrase to add vividness to your descriptions, highlighting someone's mental quickness and keen understanding.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

razor-sharp

Stresses the incisiveness and precision of thought.

bright as a button

Emphasizes a cheerful and lively intelligence.

quick-witted

Focuses more on the speed of understanding and responding intelligently.

smart

A common and versatile term for intelligence.

on the ball

Highlights attentiveness and preparedness.

astute

Indicates shrewdness and the ability to assess situations accurately.

perceptive

Highlights the ability to notice and understand subtle details.

clever

A general term for intelligence or ingenuity.

intelligent

A formal term for having a high mental capacity.

knowledgeable

Emphasizes having a wide range of information and understanding.

FAQs

How can I use "sharp as a tack" in a sentence?

You can use "sharp as a tack" to describe someone who is very intelligent and quick-witted. For example, "Even in his 90s, my grandfather is still "sharp as a tack" and enjoys solving complex puzzles".

What's a more formal way to say "sharp as a tack"?

More formal alternatives to "sharp as a tack" include "astute", "intelligent", or "perceptive". The best choice depends on the specific nuance you want to convey.

Is "sharp as a tack" appropriate for all types of writing?

While "sharp as a tack" is widely understood, it's generally considered an informal expression. For academic or highly formal writing, consider using more direct and professional vocabulary such as "knowledgeable" or "quick-witted".

What does it mean when someone is described as "sharp as a tack"?

When someone is described as "sharp as a tack", it means they are mentally alert, intelligent, and quick-thinking. It suggests they have a keen mind and are perceptive.