Definition of rebars:
(n) :
(countable) A steel reinforcing bar in a reinforced concrete structure.
(n) :
(uncountable) A grid-shaped system of such bars.
(v) :
(transitive) To reinforce with bars of this kind.
(v) :
(transitive) To bar again.
(v) :
(music, transitive) To redistribute the notes of a musical score across the bars, e.g. when changing time signature.