- natural [nach′ər əl, nach′rəl]adj.[OFr < L naturalis, by birth, according to nature]1. of or arising from nature; in accordance with what is found or expected in nature2. produced or existing in nature; not artificial or manufactured3. dealing with nature as an object of study [a natural science]4. in a state provided by nature, without man-made changes; wild; uncultivated5. of the real or physical world as distinguished from a spiritual, intellectual, or imaginary world6.a) present by virtue of nature; innate; not acquiredb) having certain qualities, abilities, etc. innately [a natural comedian]7. innately felt to be right; based on instinctive moral feeling [natural rights]8. true to nature; lifelike [a natural likeness]9. normal or usual; in the ordinary course of events [a natural outcome]10. customarily expected or accepted [a natural courtesy]11. free from affectation or artificiality; at ease [a natural smile]12. without a legal relationship; specif.,a) illegitimate [a natural child]b) relating biologically rather than by adoption [natural parents]13. with little or no processing, artificial ingredients or preservatives [natural food]14. off-white, light-beige, etc.15. resulting from age, disease, etc. rather than an accident, violence, etc. [a natural death, death from natural causes]16. Biol. designating or of a system of classification based on complete structure and characteristics17. Math.a) designating or of an integer or any number referred to 1 as the baseb) designating or of an actual number as distinguished from its logarithm [a natural sine, cosine, etc.]18. Musica) without flats or sharps, as the key of C majorb) modified in pitch by the sign (♮)c) neither sharped nor flattedn.1. a person without normal intelligence; fool; idiot2. Informal a person who is or seems to be naturally expert☆ 3. Informal a thing that is, or promises to be, immediately successful☆ 4. Informal a winning roll of 7 or 11 on a first throw in craps5. Musica) a sign (♮) used to remove the effect of a preceding sharp or flat within the measure in which it occurs: in full, natural signb) the note so changedc) a white key on a pianoSYN.- NORMALnaturalnessn.
English World dictionary. V. Neufeldt. 2014.