Meanings
indefiniteeverything; all
Ich habe alles vergessen.I have forgotten everything.
colloquialUsed with an interrogative to express that the answer probably covers more than one item, like dialectal English all.
Wer war alles schon mal in Spanien?Who all has ever been to Spain?
Examples
GermanEnglish
Er tat das alles nur für sich.He did that all for himself.
Das ist alles sehr neu für mich.It's all very new to me.