un·der·sup·ply (ŭn'dər-sə-plī') n.
pl.un·der·sup·plies A supply smaller than what is appropriate or required. tr.v.
(ŭn'dər-sə-plī') un·der·sup·plied, un·der·sup·ply·ing, un·der·sup·plies To supply in an amount insufficient to what is appropriate or required: undersupplied the troops with blankets; undersupplied blankets to the troops.