Noun
(soccer) Collectively, the defenders of a team.
(field hockey) The line running across the goal to the corners of the playing field.
(rugby) The players known as the backs, whose primary responsibility is defense.
(rugby) The imaginary tactical line across the field that passes through the backs, through their primary line of attack/defence (i.e. excluding any players in a more backward defensive position).
Source: en.wiktionary.orgBoxall is doing all that at 6-2 and age 32 on a defensive back line he has anchored since two-time MLS Defender of the Year Ike Opara’s season ended in June. Source: Internet
Ekong is known as one of the best central defenders in the world considering the level at which the operates at the back line. Source: Internet
Falkon threatened again when her cross-shot was blocked by Janice Xuereb before the Malta back line averted the danger as Malta led by 1-0 at half-time. Source: Internet
Since 1881, pitchers had pitched within a "box" whose front line was convert from home base, and since 1887 they had been compelled to toe the back line of the box when delivering the ball. Source: Internet
The January 2006 signings had a huge impact on United's performances – Patrice Evra and Nemanja Vidić came in to form a solid back line along with already existing players Rio Ferdinand and skipper Gary Neville. Source: Internet
Adrian Popa set Grabban away down the right wing and the pacey forward outstripped Villa’s back line before whipping a delightful ball towards the far post. Source: Internet