undershoot verb 4noun 2forms 3 verb4 •To shoot not far enough or not well enough. •To fail to go far enough when trying to reach a goal. •To underestimate.The first day, I think I undershot how much I should've been drinking, because it had almost no effect on me. — 2014 •To record too little photographic footage. noun2 •The situation where a neuron's membrane potential falls below the normal resting potential. •An instance of undershooting. formsundershot · undershooting · undershoots