noun, noun, used as a suffix
all present; everyone; all of us
Refers to all members of a group, often used in formal or collective contexts. Can stand alone as a noun or attach to a group name as a suffix (e.g., 社員一同).
一同を代表して、私がご挨拶申し上げます。
On behalf of everyone present, I will give a greeting.
All of us employees wish for the success of the new product.