Pronunciation: (nach'ur-ul, nach'rul),[key] —adj. 1. existing in or formed by nature (opposed to artificial): a natural bridge. 2. based on the state of things in nature; constituted by nature: Growth is a natural process. 3. of or pertaining to nature or the universe: natural beauty. 4. of, pertaining to, or occupied with the study of natural science: conducting natural experiments. 5. in a state of nature; uncultivated, as land.
6. growing spontaneously, without being planted or tended by human hand, as vegetation.
7. having undergone little or no processing and containing no chemical additives: natural food; natural ingredients. Cf. organic (def. 11).
8. having a real or physical existence, as opposed to one that is spiritual, intellectual, fictitious, etc.
9. of, pertaining to, or proper to the nature or essential constitution: natural ability. 10. proper to the circumstances of the case: a natural result of his greed. 11. free from affectation or constraint: a natural manner. 12. arising easily or spontaneously: a natural courtesy to strangers. 13. consonant with the nature or character of.
14. in accordance with the nature of things: It was natural that he should hit back. 15. based upon the innate moral feeling of humankind: natural justice. 16. in conformity with the ordinary course of nature; not unusual or exceptional.
17. happening in the ordinary or usual course of things, without the intervention of accident, violence, etc.
18. related only by birth; of no legal relationship; illegitimate: a natural son. 19. related by blood rather than by adoption.
20. based on what is learned from nature rather than on revelation.
21. true to or closely imitating nature: a natural representation. 22. unenlightened or unregenerate: the natural man. 23. being such by nature; born such: a natural fool. 24. Music. a. neither sharp nor flat.
b. changed in pitch by the sign ♮.
25. not treated, tanned, refined, etc.; in its original or raw state: natural wood; natural cowhide. 26. (of a horn or trumpet) having neither side holes nor valves.
27. not tinted or colored; undyed.
28. having a pale tannish or grayish-yellow color, as many woods and untreated animal skins.
29. Cards. a. being a card other than a wild card or joker.
b. (of a set or sequence of cards) containing no wild cards.
30. having or showing feelings, as affection, gratitude, or kindness, considered part of basic human nature.
31. Afro (def. 1).
—n. 1. any person or thing that is or is likely or certain to be very suitable to and successful in an endeavor without much training or difficulty.
2. Music. a. a white key on a piano, organ, or the like.
b. the sign ♮, placed before a note, canceling the effect of a previous sharp or flat.
c. a note affected by a ♮, or a tone thus represented.
3. an idiot.
4. Cards.blackjack (def. 2b).
5. Afro (def. 2).
6. (in craps) a winning combination of seven or eleven made on the first cast.
7. a natural substance or a product made with such a substance: an ointment containing mink oil and other naturals.