Learn how to say Sandbox correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word sandbox:
1a box containing sand, especially one kept on a train to hold sand for sprinkling on to slippery rails.
historical a perforated container for sprinkling sand on to wet ink in order to dry it.
North American a children’s sandpit.
Computing a virtual space in which new or untested software or coding can be run securely.
2 (also sandbox tree) a tropical American tree whose seed cases were formerly used to hold sand for blotting ink.
Hura crepitans, family Euphorbiaceae