1. An actor with a minor part in a production. I know you're disappointed to just be a spear carrier in the play, but if you do well in this role, maybe you'll get a bigger one next year.

2. By extension, a subordinate, especially one who has an unimportant role in some group or thing. Adam's just a spear carrier, we can make this decision without him. Have one of those spear carriers get me a cup of coffee!