Definitions of natural:

• noun:   (craps) a first roll of 7 or 11 that immediately wins the stake
• noun:   a notation cancelling a previous sharp or flat
• noun:   someone regarded as certain to succeed

  Example: "He's a natural for the job"

• adjective:   being talented through inherited qualities

  Example: "A natural leader"

• adjective:   related by blood; not adopted

  Example: "Natural parent"

• adjective:   in accordance with nature; relating to or concerning nature

  Example: "A very natural development"

• adjective:   existing in or produced by nature; not artificial or imitation

  Example: "A natural pearl"

• adjective:   existing in or in conformity with nature or the observable world; neither supernatural nor magical

  Example: "A perfectly natural explanation"

• adjective:   of a key containing no sharps or flats

  Example: "B natural"

• adjective:   functioning or occurring in a normal way; lacking abnormalities or deficiencies

  Example: "It's the natural thing to happen"

• adjective:   (used especially of commodities) in the natural unprocessed condition

  Example: "Natural yogurt"

• adjective:   unthinking; prompted by (or as if by) instinct

  Example: "A cat's natural aversion to water"

• adjective:   unaffected and natural looking

  Example: "A natural reaction"