Pronunciation: (di-dOOs', -dyOOs'), [key]
—v.t., -duced, -duc•ing.
1. to derive as a conclusion from something known or assumed; infer: From the evidence the detective deduced that the gardener had done it.
2. to trace the derivation of; trace the course of: to deduce one's lineage.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.