If you've ever stopped while typing and wondered whether the word should be "definitely" or "definately," you're far from alone. It's one of the most frequently misspelled words in English, appearing everywhere from text messages and emails to academic papers and business documents.

The confusion is understandable because the incorrect version sounds almost identical to the correct one when spoken. However, only one spelling is accepted in standard English.

In this guide, you'll learn the correct spelling, why so many people make the mistake, where the word comes from, simple memory tricks to remember it, and practical tips to ensure you never spell it incorrectly again.

The Short Answer

Definitely is the only correct spelling.

Definately is a common misspelling and should never be used in formal or informal writing.

Examples

Correct:

• I will definitely attend the meeting.
• She is definitely the best person for the job.
• That is definitely the right answer.

Incorrect:

• I will definately attend the meeting.
• She is definately the best person for the job.

Whenever you're writing, choose definitely.

Why People Misspell "Definitely"

The mistake usually happens because people spell the word based on how it sounds rather than where it comes from.

When spoken naturally, the middle syllable often sounds like a soft "uh," making it easy to assume the word contains the letter "a." In reality, it doesn't.

Another reason is that English has many words ending in "-ate," such as:

• separate
• desperate
• moderate

Because of these familiar patterns, many writers instinctively type definately, even though the spelling doesn't follow the same rule.

The safest approach is to remember the word's origin instead of relying on pronunciation.

Why "Definitely" Is Correct

The word definitely comes directly from the adjective definite.

Simply add -ly:

definite + ly = definitely

Notice that definite contains the letter "i," not "a." Since the root word never changes, neither does the adverb.

This is why definately has no grammatical or historical basis.

Word Origin

Understanding a word's history often makes it easier to remember its spelling.

The journey looks like this:

• Latin: definitus ("determined" or "defined")
• Middle English: definite
• Modern English: definitely

Throughout its history, the word has always contained the letter "i."

There has never been a standard English form spelled with "a."

Common Misspellings

Besides definately, several other incorrect versions appear regularly.

Only definitely is correct.

Easy Ways to Remember the Correct Spelling

1. Think of the Root Word

The easiest trick is to remember:

definite → definitely

If you can spell definite, you can spell definitely.

2. Find "Finite"

Look closely:

deFINITEly

The word finite appears inside definite.

Since finite uses the letter "i," the full word does too.

3. Remember: No Letter "A"

A simple rule works well:

If the word contains the letter "a," it's spelled incorrectly.

There is no a anywhere in definitely.

4. Say It Slowly

Break the word into parts:

de-fin-ite-ly

Hearing each section separately makes the correct spelling easier to recall.

Examples in Everyday Writing

Professional

• I'll definitely send the report this afternoon.
• We will definitely discuss this during the meeting.
• This proposal is definitely worth considering.

Academic

• The evidence definitely supports the conclusion.
• This topic definitely deserves further research.
• The experiment definitely produced measurable results.

Everyday Conversation

• I'm definitely coming tonight.
• That's definitely my favourite film.
• You'll definitely enjoy this restaurant.

Incorrect Examples

Avoid writing:

• I'll definately call you later.
• That's definately true.
• She's definately the winner.

Why Correct Spelling Matters

Although definately is a small mistake, it can leave a negative impression.

Professional Writing

Emails, proposals, CVs, and reports appear more polished when common spelling mistakes are avoided.

Academic Work

Teachers and examiners often notice repeated spelling errors, which can affect the overall quality of an assignment.

Online Content

Correct spelling helps articles appear more trustworthy and professional. Readers are also more likely to stay engaged with content that is free of obvious mistakes.

Personal Credibility

Small errors may seem insignificant on their own, but they can influence how carefully your writing is perceived.

Tips to Avoid This Mistake

• Always think of definite before writing definitely.
• Remember there is never an "a" in the word.
• Look for finite inside definite.
• Read your writing carefully before sending or publishing it.
• Use spell-check as a helpful backup rather than relying on it completely.
• Practise writing the word several times until it becomes automatic.

Frequently Asked Questions

Is "definately" ever correct?

No. It is always considered a spelling mistake.

Why do so many people write "definately"?

Because the word's pronunciation can make the middle vowel sound unclear, leading people to spell it by ear instead of following the root word.

Is "definitely" an adverb?

Yes. It modifies verbs, adjectives, or entire sentences to express certainty or emphasis.

How can I remember the spelling?

Think of definite + ly or notice the word finite hidden inside definite.

Final Thoughts

The answer to Definitely vs Definately is simple: definitely is the only correct spelling, while definately is always incorrect.

The confusion comes from pronunciation, but the spelling becomes much easier to remember once you connect the word to its root, definite. A few simple memory tricks—such as spotting finite inside the word or remembering that it never contains the letter "a"—can help you avoid this common mistake permanently.

Whether you're writing an email, preparing an assignment, publishing a blog post, or chatting with friends, using definitely correctly makes your writing clearer, more polished, and more professional.