GNU Dico
From WordNet dictionary, version 3.0:
crude
n. 1. a dark oil consisting mainly of hydrocarbons
Synonyms: petroleum, crude oil, rock oil, fossil oil, oil
s. 1. not carefully or expertly made; "managed to make a crude splint"; "a crude cabin of logs with bark still on them"; "rough carpentry"
Synonyms: rough
2. conspicuously and tastelessly indecent; "coarse language"; "a crude joke"; "crude behavior"; "an earthy sense of humor"; "a revoltingly gross expletive"; "a vulgar gesture"; "full of language so vulgar it should have been edited"
Synonyms: earthy, gross, vulgar
3. not refined or processed; "unrefined ore"; "crude oil"
Synonyms: unrefined, unprocessed
4. belonging to an early stage of technical development; characterized by simplicity and (often) crudeness; "the crude weapons and rude agricultural implements of early man"; "primitive movies of the 1890s"; "primitive living conditions in the Appalachian mountains"
Synonyms: primitive, rude
5. devoid of any qualifications or disguise or adornment; "the blunt truth"; "the crude facts"; "facing the stark reality of the deadline"
Synonyms: blunt, crude(a), stark(a)
6. not processed or subjected to analysis; "raw data"; "the raw cost of production"; "only the crude vital statistics"
Synonyms: raw