A companion in battle; fellow soldier.
A fellow socialist, communist or other similarly politically aligned person.
A non-hierarchical title, functionally similar to "Mr.", "Mrs.", "Miss", "Ms." etc, in a communist or socialist state.
A mate, companion, or associate.
To associate with in a friendly way.
A member of a confederacy.
An accomplice in a plot.
An actor who participates in a psychological experiment pretending to be a subject but in actuality working for the researcher.
To combine in a confederacy.
of, relating to, or united in a confederacy
banded together; allied.