central defender
noun [ C ] uk/ˌsen.trəl dɪˈfen.dər/ us/ˌsen.trəl dɪˈfen.dɚ/
（足球队的）中卫
on a football team, one of the two defenders who play in the middle of the pitch
The full backs should fill in when the central defender moves to an advanced position. 当中卫向前方移动时，后卫应该填补他们的位置。