Dictionary of Portuguese - more than 120 000 words and definitions!
New Dictionary of the Portuguese Language (Cândido de Figueiredo)
Dictionary of Portuguese - simple and fast, with large number of words
The New Dictionary of the Portuguese Language of Cândido de Figueiredo of 1913 is in the Public Domain. Its version transcribed by volunteers in Distributed Proofreaders under the supervision of Rita Farinha is also in the Public Domain. This document can be freely downloaded and used, from the Gutenberg Project website http://www.gutenberg.org/.