1. To expend money or any other possession; to consume, use, waste, or part with, anything; as, he who gets easily spends freely. He spends as a person who knows that he must come to a reckoning. (south)
2. To waste or wear away; to be consumed; to lose force or strength; to vanish; as, energy spends in the using of it. The sound spendeth and is dissipated in the open air. (bacon)
3. To be diffused; to spread. The vines that they use for wine are so often cut, that their sap spendeth into the grapes. (bacon)
4. (Science: chemical) To break ground; to continue working.