1. To lead forth. [A Latinism] He should hither deduce a colony. Selden. 2. To take away; to deduct; to subtract; as, to deduce a part from the whole. [Obs.] B. Jonson. 3. To derive or draw; to derive by logical process; to obtain or arrive at as the result of reasoning; to gather, as a truth or opinion, from what precedes or from premises; to infe...