- (may take a clause as object) to reach (a conclusion about something) by reasoning; conclude (that); infer
- archaic to trace the origin, course, or derivation of
WordReference Random House Learner's Dictionary of American English © 2017
de•duce /dɪˈdus, -ˈdyus/USA pronunciation v., -duced, -duc•ing.WordReference Random House Unabridged Dictionary of American English © 2017
de•duce (di do̅o̅s′, -dyo̅o̅s′),USA pronunciation v.t., -duced, -duc•ing.
de•duc′i•bil′i•ty, de•duc′i•ble•ness, n.
Collins Concise English Dictionary © HarperCollins Publishers::
deduce /dɪˈdjuːs/ vb (transitive)
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