Definition of "crude"

crude

/kɹuːd/

adjective
comparative cruder, superlative crudest
1. In a natural, untreated state.
2. Characterized by simplicity, especially something not carefully or expertly made.
3. Lacking concealing elements.
4. Lacking tact or taste.
5. (archaic) Immature or unripe.
6. (obsolete) Uncooked, raw.
  Quotations
  Her mete was very crude,She had not wel endude; […]
  c. 1503–1512, John Skelton, Ware the Hauke; republished in John Scattergood, editor, John Skelton: The Complete English Poems, 1983, page 63, lines 77–78
7. (grammar) Pertaining to the uninflected stem of a word.
noun
countable and uncountable, plural crudes
1. Any substance in its natural state.
2. Crude oil.
  Quotations
  The dawn of the oil age was fairly recent. Although the stuff was used to waterproof boats in the Middle East 6,000 years ago, extracting it in earnest began only in 1859 after an oil strike in Pennsylvania. The first barrels of crude fetched $18 (around $450 at today’s prices).
  2013 August 3, “Yesterday’s fuel”, in The Economist, volume 408, number 8847