a box or case in which tools are kept.
an attached mechanism, as on planing machines or lathes, that carries the cutting tools.

Origin of toolbox

First recorded in 1835–45; tool + box1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for toolbox

Contemporary Examples of toolbox

Historical Examples of toolbox

Word Origin and History for toolbox

also tool-box, 1832, from tool (n.) + box (n.1).

Online Etymology Dictionary, © 2010 Douglas Harper