Significant: Definition, Meaning, and Examples

Last Updated on
September 7, 2026

1. Significant (adjective): Having meaning or importance; notable or noteworthy.
2. Significant (adjective): Large enough to be noticed or have an effect; considerable or substantial.
3. Significant (adjective, statistical): Relating to results unlikely due to chance; statistically meaningful.
4. Significant (informal): Suggestive in expression; implying something not directly stated.

"Significant" is a widely used word with both literal and technical meanings. It can refer to something important, impactful, or even subtly expressive. It plays a key role in everyday language, academic writing, and even statistics. Read on to explore how "significant" is used in different contexts and why it matters so much in communication.

"Significant" Definition: What Does "Significant" Mean?

"Significant" generally describes something that holds meaning, importance, or influence. Whether you're talking about a meaningful moment, a large result, or a scientific finding, "significant" is the word people reach for to emphasize impact.

Definition of "Significant": Importance or Meaning

This is the most common use of "significant." It refers to something that stands out because it's important, meaningful, or valuable. In conversations, decisions, or events, this version highlights something that deserves attention.

Definition of "Significant": Large Enough to Matter

Here, "significant" refers to size or effect. If something is big enough to make a difference, it's considered significant. This usage is common in science, medicine, business, and news reports.

Definition of "Significant": Statistically Meaningful

In statistics, "significant" has a technical meaning. A result is statistically significant if it is unlikely to have occurred by chance. This doesn't always mean the result is important in the real world—it means the result is trustworthy.

Definition of "Significant": Suggestive or Implied

Used informally, "significant" can describe a look or gesture that suggests something deeper. A "significant glance," for example, might imply understanding or a hidden message between two people.

Parts of Speech

The word "significant" is mainly used as an adjective. It describes nouns by pointing out their importance, size, or implication. Though rarely used in other forms, related words like "significantly" (adverb) and "significance" (noun) are very common and help express similar ideas in different grammatical contexts.

How to Pronounce "Significant"?

"Significant" is a four-syllable word and is easy to pronounce once broken down.

To pronounce "significant," start with “sig,” which rhymes with “dig.” Next, say “nif,” like in “sniff.” Then follow with “i,” which sounds like a soft "uh," and finally end with “cant,” pronounced like “kənt.” Put the stress on the second syllable: “nif.”

Phonetic Pronunciation: /sɪɡ-NIF-ɪ-kənt/

Synonyms of "Significant": Other Ways to Say "Significant"

Knowing the synonyms of "significant" can help you vary your word choice and express yourself more precisely. Here are some words that can be used in place of "significant," depending on the context:

  • Important
  • Meaningful
  • Notable
  • Considerable
  • Substantial
  • Major
  • Marked
  • Weighty
  • Consequential
  • Serious

Antonyms of "Significant": Other Ways to Say "Significant"

Understanding the opposites of "significant" helps clarify its true meaning and shows how it contrasts with less impactful ideas.

  • Insignificant
  • Trivial
  • Unimportant
  • Minor
  • Negligible
  • Meaningless
  • Petty
  • Unremarkable
  • Forgettable
  • Inconsequential

Examples of "Significant" in a Sentence

Here are ten examples that show how "significant" is used in real-life sentences. These examples highlight its flexibility in different topics and tones.

  1. The discovery marked a significant moment in the field of medicine.
  2. There was a significant drop in temperature overnight.
  3. The judge gave him a significant look before announcing the verdict.
  4. Her contributions to the project were significant and much appreciated.
  5. This study found a significant link between diet and heart health.
  6. We don’t expect any significant delays on the road today.
  7. His voice carried a significant tone that made everyone listen.
  8. They made a significant investment in renewable energy sources.
  9. She showed significant improvement after the new treatment.
  10. That one decision had a significant impact on his entire career.

Frequency of Use

The word "significant" is used frequently in both spoken and written English, especially in academic, scientific, and professional contexts. According to Google's Ngram Viewer, usage of "significant" has steadily increased since the 1900s, peaking in recent decades due to its importance in research and formal writing. Its technical meaning in statistics also contributes to its widespread use.

Variants of "Significant"

"Significant" has a few notable variations that shift its role in a sentence but keep its core idea intact.

  1. Significantly: An adverb meaning "in an important or noticeable way."
  2. Significance: A noun referring to the quality of being important or having meaning.
  3. Insignificant: An adjective that means the opposite—something unimportant or minor.

Related Terms to "Significant"

These words are often connected to or used with "significant" in writing and conversation.

  1. Meaning
  2. Impact
  3. Importance
  4. Effect
  5. Statistical
  6. Symbolic
  7. Indication
  8. Magnitude
  9. Relevance
  10. Consequence

Etymology: History and Origins of "Significant"

The word "significant" comes from the Latin word significans, which means “indicating” or “showing.” It evolved from the verb significare, meaning “to signify.” The word entered English in the late 1500s and was originally used to describe things that conveyed meaning. Over time, it took on broader definitions, including importance and measurable effects, especially in science and data analysis.

Derivatives and Compounds of "Significant"

Here are a few related words that derive from or are compounded with "significant." They extend its meaning and allow for more precise communication.

  1. Significantly: Describes the degree or way something is significant.
  2. Significance: Refers to the quality of being significant.
  3. Statistically significant: A compound phrase used in research to indicate a meaningful result not due to chance.

Common Misspellings of "Significant"

Misspelling "significant" can lead to confusion, especially in formal writing. Watch out for these common errors:

  1. Signifigant
  2. Signifcant
  3. Significent
  4. Significunt
  5. Significan

10 Idioms Similar to "Significant"

Idioms that express importance or notable effects can act as colorful alternatives to "significant."

  1. A big deal
  2. Carry weight
  3. Make waves
  4. Turn heads
  5. Game changer
  6. Pack a punch
  7. Raise eyebrows
  8. Move the needle
  9. Leave a mark
  10. Not just a drop in the bucket

10 Common Questions About "Significant"

People often have questions about how to use "significant" correctly. Here are some helpful answers.

1. What does "significant" mean in general?

"Significant" means important, meaningful, or large enough to have an effect or be noticed.

2. Can "significant" be used in math or science?

Yes, it often refers to measurable differences, especially in research or statistics where results are unlikely due to chance.

3. Is "significant" always about size?

No, it can also refer to importance, symbolism, or meaning, not just size or amount.

4. What is a "significant other"?

This term refers to a romantic partner who plays an important role in one’s life, such as a boyfriend, girlfriend, or spouse.

5. What makes a finding "statistically significant"?

It means the result is unlikely to have happened by random chance, indicating it's probably a real effect or difference.

6. How is "significant" different from "important"?

"Important" is more general, while "significant" often includes measurable impact or deeper meaning.

7. Can a glance really be "significant"?

Yes, a "significant glance" can silently communicate understanding, feelings, or a hidden message.

8. What's a "significant moment"?

It’s a time or event that has great meaning or impact, such as a life-changing decision or milestone.

9. Can "significant" have a negative meaning?

Yes, if something harmful or unwanted is large or meaningful in impact, it can be called significant in a negative way.

10. How can I use "significant" in a sentence about change?

You could say, “The new policy led to a significant change in employee satisfaction.”

Conclusion

"Significant" refers to something important, meaningful, or large enough to have an impact. It’s a valuable word that works in everyday speech, science, relationships, and more. Keep exploring and using words like "significant" to enrich your vocabulary and express yourself more clearly.

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