Do all together and altogether mean the same and if not, what are the differences?
No. "All together" is used to refer to a collection of people or things that are in the same place; for example, "The spoons are all together in the left drawer." "Altogether" means "in sum" or "in total"; for example, "Altogether, the repairs to my car cost $4000."
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1+1 Nice. So they have different meanings altogether. :) Altogether here means "completely". – b.roth Aug 16 '10 at 15:35
"All together" means everyone or everything together. Where "altogether" is an adverb and means "all in all," "all told," or "completely."
Examples:
It's time to sing. All together now!
That was altogether too difficult.
Source: e Learn English Language
References: