0 a defending player in games such as football and hockey who plays near the end of the field, or an attacking player in American football whose position is behind the quarterback and beside the halfbacks -- （足球、曲棍球等中的）防守后卫；（美式橄榄球中控球方的）后卫
He has also played fullback and wide receiver.
In those days fullbacks punted and often did the placekicking.
The fullback, in addition to rushing and blocking responsibilities, can also be more involved in the passing game.
With the fullback in the backfield as a blocker, runs can be made to either side of the line with his additional blocking support.
His usual position was at fly-half or at fullback.
His primary position is on the wing, though he has also played at fullback, while earlier in his career he played at scrum-half.
He usually played as a fullback and sometimes as a scrum-half.
A rugby union fullback generally fields the long range kicks, and makes long range attacks.
