borax /ˈbɔɹ.æks/noun 3verb 1forms 4phrases 1 noun3 •A white or gray/grey crystalline salt, found in nature as a mineral, with a slight alkaline taste, used as a flux, in soldering metals, making enamels, fixing colors/colours on porcelain, and as a soap, etc.“The best way to clean the machine is to put a pound of borax and a gallon of vinegar in the machine and run the longest, hottest cycle you have,” he says. — 2025 •The sodium salt of boric acid, Na₂B₄O₇, either anhydrous or with 5 or 10 molecules of water of crystallization. •[before a noun] Cheap or tawdry furniture or other works of industrial design. verb1 •To treat with borax. formsboraxed · boraxing · boraxes · boraces Phrases with borax no borax, no glueDenotes that the speaker is seeking or sharing a way to accomplish a difficult task that omits core ingredients or sidesteps the orthodox approaches.