1.a dark oil consisting mainly of hydrocarbons
2.not carefully or expertly made;
managed to make a crude splint
3.conspicuously and tastelessly indecent;
coarse language
4.not refined or processed;
unrefined ore
5.belonging to an early stage of technical development; characterized by simplicity and (often) crudeness;
the crude weapons and rude agricultural implements of early man
6.devoid of any qualifications or disguise or adornment;
the blunt truth
7.not processed or subjected to analysis;
raw data