In baseball, a "farm team" is a minor league team affiliated with a Major League Baseball (MLB) organization. Such minor league teams are under the control of the MLB organization through strict franchise rights.
A farm team is usually part of a greater "farm system", comprised of many teams affiliated with a single MLB organization. The teams are separated by division, from "Rookie" to "Triple A" (AAA). The purpose behind such a franchise system is to allow baseball organizations to train their own talent and to control the destination of that talent, either by trading valuable prospects for skilled MLB players from other teams or by moving players from the farm team up through the ranks into the major leagues.