rebar

noun

1. (countable)A steel reinforcing bar in a reinforced concrete structure.

   “The floor and walls for Copthall tunnel have already been constructed using formwork into which rebar (reinforcing bar) was placed, and then concrete poured.”

2. (uncountable)A grid-shaped system of such bars.

   “The hash mark of rebar or the curve of a hubcap will create curious shapes to be decoded; even, perhaps, entire subway trains and lengths of tracks will remain.”

verb

1. (transitive)To reinforce with bars of this kind.
2. (transitive)To bar again.

   “After allowing the stranger to enter, she rebarred the door.”

3. (transitive)To redistribute the notes of a musical score across the bars, e.g. when changing time signature.