In semi-automatic firearms, a failure of the next round to completely enter the chamber. A misfeed can keep the gun from going into battery, which in turn may prevent the gun from firing. Misfeeds and failures to feed are closely related: a failure to feed is a round that never even leaves the top of the magazine, while a misfeed is a round that leaves the magazine but does not enter the chamber. Learn how to deal with a misfeed in the article titled Clearing a Misfeed.