Although logically linked with someone engaged in war, a warrior can be anyone who fights the good fight, whether in politics, on the job, or just as a "weekend warrior" trying to accomplish multiple tasks during off-hours at home.
As the Old French guerre meant "war," it led to the word guerreor for someone who wages war. This eventually morphed into the word we know as warrior. The word can also refer to someone fighting a philosophical or political war. Author Carlos Castandeda said, "Nobody is born a warrior, in exactly the same way that nobody is born an average man. We make ourselves into one or the other.” After ridding the kitchen of ants, you felt like a proud warrior.