sandbox \ˈ ̷ ̷ˌ ̷ ̷\noun Etymology:sand (I) + box 1.: a box or other receptacle containing loose sand: as a.: a shaker for sprinkling sand upon wet ink b.: sand dome c.: a box that is large enough to sit in and contains sand for children to play in 2.: sand mold 3. a.: sandbox tree b.: its explosive pod often filled with shot and used as a paperweight