To have just and adequate ideas of; to apprehended the meaning or intention of; to have knowledge of; to comprehend; to know; as, to understand a problem in Euclid; to understand a proposition or a declaration; the court understands the advocate or his argument; to understand the sacred oracles; to understand a nod or a wink. "Speaketh (i. e., speak thou) so plain at this time, I you pray, That we may understande what ye say." "I understand not what you mean by this." "Understood not all was but a show." "A tongue not understanded of the people."