[ ree-bahr ]
/ ˈriˌbɑr /
noun Building Trades Informal.
a steel bar or rod used to reinforce concrete.
Origin of rebar
1960–65, Americanism; re(inforcing) bar
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for rebar
Its walls are made of thick concrete with rebar reinforcing rods.
Here follows the motto: "Quotque aderant Vates, rebar adesse Deos."The Age of Shakespeare|Algernon Charles Swinburne
also re-bar, "steel reinforcing rod in concrete," 1961, from re(inforced) bar.
Online Etymology Dictionary, © 2010 Douglas Harper