rebar /ˈɹiː.bɑː(ɹ)/noun 2verb 1/ɹiːˈbɑː(ɹ)/ verb 2forms 3 noun2 •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. — 2023 •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. — 2020 verb1 •To reinforce with bars of this kind. rebar /ɹiːˈbɑː(ɹ)/ verb2 •To bar again.After allowing the stranger to enter, she rebarred the door. •To redistribute the notes of a musical score across the bars, e.g. when changing time signature. formsrebarred · rebarring · rebars