1. All at the same time; SYN. all at once.
2. Used of a group whose members acted or were acted upon collectively and when 'all' and 'together' can be separated by other words.

ETYM Old Eng. altogedere; al all + togedere together. Related to Together.
With everything included or counted; SYN. all told, in all.

All together; SYN. en bloc, as a group.
(French) As a group, in a body, all together.

Alike, consistent