Altogether vs Completely

When to use each in English, with meaning, register, and examples.

Altogether

Top 2,000 (common)B2adverb

Completely

Top 1,000 (very common)A2adverb
Most common: Completely
 AltogetherCompletely
Pronunciation🇬🇧 /["/ˌɔːltəˈɡeðə(r)/"]/🇺🇸 /["/ˌɔːltəˈɡeðər/"]/🇬🇧 /["/kəmˈpliːtli/"]/🇺🇸 /["/kəmˈpliːtli/"]/
MeaningCompletely or in total.Totally or fully.
ExampleThe train went slower and slower until it stopped altogether.I completely forgot about the meeting today.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB2A2
Part of speechadverbadverb
Collocationsaltogether now, altogether different, altogether combinedcompletely agree, completely understand, completely satisfied, completely different, completely unaware
Antonymspartially, separatelypartially, incompletely, somewhat
Common mistakesConfused with 'all together', which means everyone or everything gathered., Omitting it in sentences where emphasis on total is needed., Using it in a place where 'completely' would be better.Using 'completely' without a verb or action., Confusing 'completely' with 'totally' in formal contexts., Saying 'completely' in casual situations where simpler words like 'really' might fit better.
Usage notesUse 'altogether' when you want to emphasize a total amount. Avoid in very formal writing; 'in total' might be better.Use 'completely' to emphasize the totality of an action or state. It's suitable for both spoken and written English but might sound overemphasized in casual conversation.

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Completely

Frequently asked questions: Altogether vs Completely

What's the difference between Altogether and Completely?

Altogether: Completely or in total. Completely: Totally or fully.

Which is more common: Altogether and Completely?

Completely is the most common in everyday English.

Which is more advanced: Altogether and Completely?

Altogether is the highest level, at B2, on the CEFR scale.

Are Altogether and Completely the same CEFR level?

Altogether: B2, Completely: A2 on the CEFR scale.

What part of speech are Altogether and Completely?

Altogether: adverb, Completely: adverb.

Can you show an example of each?

Altogether: The train went slower and slower until it stopped altogether. Completely: I completely forgot about the meeting today.

Can I use Altogether and Completely interchangeably?

Not always. Altogether and Completely are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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