Brown–Driver–Briggs is a Hebrew and English Lexicon of the Old Testament known as Brown–Driver–Briggs or BDB (from the name of its three authors). Brown–Driver–Briggs was first published in 1906.

Brown–Driver–Briggs is a standard reference for Biblical Hebrew and Aramaic. It is organized by (Hebrew) alphabetical order of three-letter roots. The chief editor was Francis Brown, with the co-operation of Samuel Rolles Driver and Charles Augustus Briggs, hence the name Brown–Driver–Briggs.

See also (as I add them) Thayer, Strong, and Gesenius.