Everything or everyone in one place or in agreement
Examples:
Let's review all together before the exam begins.We worked all together to complete the project on time.The community came all together to support the cause.
Synonyms:
Antonyms:
Altogether
/ˌɔːltəˈɡeðə/
A word used to indicate completeness or totality without exceptions
Examples:
A very odd-looking old fellow altogether.You need not break with him altogether, but leave him.It seemed to be a rather eccentric household altogether.
Synonyms:
Antonyms:
This word has no antonyms
Ways to tell them apart:
All together is used when referring to a group acting collectively or simultaneously.
Altogether is used to mean completely or on the whole.
Think of all together as everyone in one place or everyone doing something at the same time.
Altogether is more abstract, indicating a state of completeness or totality.
If you can substitute completely or entirely into the sentence, altogether is likely the correct choice.