: very simple and basic : made or done in a way that does not show a lot of skill
: rude in a way that makes people uncomfortable; especially : talking about sexual matters in a rude way
: very simple and basic in a way that is true but not complete
: oil as it exists in the ground : petroleum that is not yet ready to be used as fuel
What made you want to look up crude? Please tell us where you read or heard it (including the quote, if possible).