What does the word Halloween mean and where does it come from? Well, according to some, the name is actually a shortened version of “All Hallows’ Even,” the eve of All Hallows’ Day. “Hallow” is an Old English word for “holy person,” and All Hallows’ Day is simply another name for All Saints’ Day, the day Catholics commemorate all the saints. At some point, people began referring to All Hallows’ Even as “Hallowe’en” and then simply “Halloween.”